Organic pH Down for Plants - Using Vinegar, Citric, Humic & Fulvic Acids (2023)

Update 2022: I have stopped using “organic acids” as pH Down and I am not recommending you apply these to your collection without first testing it for a few months on replaceable plants. In general, this application did work alright for some plants (which is why I had originally published this post); however, over time I found that the various forms of vinegar (white, apple cider) and also malic acid, eventually negatively affected specific plants. Vinegar specifically seems like a bad option and I wouldn’t recommend it to lower your pH—it’s too easy to irreversibly damage roots. I also have some concerns about the quality of citric acids out there—I suspect some brands have more sugar than others and if that’s true, it could lead to an increase in fungal or bacterial issues.

I don’t think that this is some magical recipe that will make your plants explode in size — it was just an experimentation to see if I could find something more reliable than phosphoric acid. Along with pH, there are a lot of cultural parameters I have learned to tweak over the years to improve my ability to grow plants (light, potting media, watering practices, etc)…pH-adjustment is just one of those things I adjust for better growth.

So please please please if you’re going to try this…proceed with extreme caution and do not apply to your whole collection.

Why did I start experimenting with “organic acids”? For the two years prior to writing this post, I had been using phosphoric acid to lower the pH of my plant-nutrient solution. That worked well—until I switched the brand I was using. In late spring of 2019, I purchased a new brand of phosphoric acid from a local greenhouse; whatever was in that new brand setback about half my collection of over 300 plants and ended up killing well over 50 plants. For months after I’ve stopped using it, I experienced a halo affect of issues ranging from setback roots, leaf spotting, leaf colour problems and general slow growth. Thankfully those issues have progressively faded, but even a full year after the whole thing, some of my most-prized orchids were still recovering. If you want to know more about that debacle, you can read the story about my pH Down blunder, here. You may be wondering, “why not switch back to the original pH Down brand that you were using before?” well now I have, but first I wanted to try some of your more accessible acids (like acetic, citric and malic acid). pH Down by General Hydroponics is what I use now and I never had issues with that brand.

Why this recipe? Despite the setback I had with phosphoric acid, I still understand the importance of acidifying my alkaline tap water in an effort to offer maximum nutrient availability. In short, it helps them grow faster and larger as key nutrients (like nitrogen) are more accessible to many types of plants. One could use RO or distilled water instead of tap water; however, I have a LOT of plants and I have been pH-adjusting water for my orchids, aroids and pretty much all of my houseplants for 3 years now. I just needed to find a more reliable way to lower the pH of my tap water and that’s why I turned to food-grade products (which are tested/approved for human consumption). I had heard many people use citric acid, vinegar, and a few other options, so I decided to explore those acids which were either safe for human consumption or are produced by plants, bacteria, or natural processes.

(Video) What HUMIC ACID can do for your LAWN

Does this recipe work when used? It did sort of but I modified it over time and eventually had to stop because a couple of my most prized plants responded poorly to it. I was using this ‘pH Down’ on a 4-week cycle across my entire collection—a cycle that involves regular tap water for three waterings, followed by a pH-adjusted feeding (so the pH swings on a monthly basis). The results were better than I expected, but it could also just be that my plants weren’t being poisoned by whatever that phosphoric acid product was. Some of my slowest growing plants like the miracle berry had doubled in size only a few months after using the organic acids but then they really slowed down later in the year. Others like my orchids produced an abundance of new roots and some of my “jungle aroids” produced their largest leaves ever, but eventually started showing issues like leaf burning and short roots. I’m a stickler for the details of my plants, so it wasn’t like a catastrophic issue…you can see my collection of plants for yourself on my instagram feed.

Without any more blabber, here’s my organic acid pH Down recipe…

Organic pH Down Recipe for Plants

Acidifying Ingredients

*Note: I use heaping table/teaspoons; not perfect measurements.

  • 1L, Empty water bottle
  • 2 tbsp, Citric acid
  • 1 tsp Humic/fulvic acid (Optional or used every other month)
  • Water; or
    Carbonated tap water – via SodaStream (optional…but provides carbonic acid)

UPDATED July, 2020: I had attempted the following acids but stopped using them after a few plants responded poorly.

  • Apple cider vinegar (.5 – 1oz) – some plants responded negatively to this after a few applications.
  • White vinegar (1 – 2oz) – seemed to work fine in general, but after a couple months I noticed some of my more sensitive plants (such as Macodes petola) started to develop slight leaf yellowing. I gradually decreased the amount of vinegar used over time and the spotting stopped, so I have entirely stopped using vinegar.
  • Malic acid (not recommended) – I stopped using this early on because it caused severe leaf spotting in select plants after a single use. It set back a few of my seedlings too. Not recommended.

Directions to Make pH Down

  1. Add all acids to the 1L bottle w/ a funnel.
  2. Top-up bottle with tap water (carbonated if you have a sodastream).
  3. Shake & use.
    ** This can be stored for short periods of time. Some have said citric acid loses acidity over time; but from my experience, it still worked after one month. I would be more concerned about bacteria growing in your solution; so if you’re going to store it for more than one watering, make sure to refresh your solution and bottle after a couple watering cycles.

What you need to use the pH Down


  • Pre-mixed acids in 1L bottle – this is your “pH Down”
  • Fertilizer (I use MSU Orchid Fertilizer)
  • A jug for combining fertilizer, your pH Down, and tap water (I use a 4L/1Gallon juice jug)

Directions For Using pH Down When Watering Plants

  1. Get a pH meter or litmus paper.
  2. Place watering jug in sink.
  3. Add fertilizer (1/4-1/2 tsp per gallon of water is generally good) to jug.
  4. Shake the “organic pH Down” vigorously before each use.
  5. Add a capful of “pH Down” to 1 gallon jug, directly into fertilizer crystals.
  6. Turn on tap and fill jug with tepid-temperature water (it should feel slightly cool, but not warm to your touch – human body is 37•C…it should feel slightly cool to you, so not cold or warm)
  7. Stir a few times with large spoon (optional)
  8. Test pH
    1. If pH is 5.5-6.5 – Good! Use on plants as you normally would water them.
    2. If pH is over 6.5 pH – add a second capful, retest pH, and either just use 2 caps or adjust the recipe for more acidity next time.
    3. If pH is lower than 5.5 pH – dilute 1L bottle by 1/2, remake & test fertilizer jug with new diluted version, and adjust the recipe next time.
  9. Use pH-adjusted fertilizer water on plants
    1. Spray the top of the potting media until the water starts to come out the bottom. You may want to read these 4 houseplant tips for some awesome foundations plant care concepts that have made me a better grower.
    2. You can also foliar feed by spraying the leaves.

Fertilizer & pH Cycling – Don’t Acidify ALL THE TIME

My watering routine is currently to alternate between one acidified watering and one non-acidified watering, and I gradually lower the fertilizer application over the 4-week cycle. I believe this will prevent any chance of acidity buildup in the substrate. If using alkaline water can result in pH climb over time from precipitates, you could imagine that using citric acid (a soluble crystal) to water could also result in a buildup of citric acid in the media, dropping the pH a bit lower each time. Maybe citric acid is broken down, but I think some people missunderstand the term “weak acid” when applied to acids like carbonic and citric acid…it doesn’t mean they are weak in their ability to exist; a week acid just holds on to the electrons more than a strong acid which freely donates electrons making the acid strength stronger. At anyrate…to prevent any chance of pH creep in either direction, I cycle the acid application with regular alkaline water to err on the side of caution. This is the monthly cycle I follow:

  1. Acidified water (to 5.8pH) + fertilizer 1/2tsp
  2. Tap water (7.9pH) + fertilizer 1/4tsp (reduced)
  3. Less-acidified water (to ~7.0pH) + fertilizer 1/4tsp (reduced)
  4. Tap water (7.9pH) flush AKA leach (no fertilizer)
  • I have used different fertilizers over the years (12-8-8, 20-20-20, etc), but now I just stick to MSU orchid fertilizer for all my plants because it includes micronutrients and because I know the product is pretty consistent.
  • I don’t need calcium (because my tap water already has a lot), but if you’re growing plants from limestone regions of the world (like from the Peruvian mountains, or Malaysian limestone outcrops), then a routine calcium boost may be helpful. *Optional and for select plants only: Once every 6-8 weeks: Acidified water + fertilizer + eggshell (see details below)

/// Disclaimer: from here down is new experimentation; I don’t yet recommend you follow this…

Calcium Supplementing for Plants Adapted to Calcium Rich Soils
Theory: Eggshells are just as effective as CalMag (if you’re adding an acid)

Eggshells are loaded with calcium—they’re literally made up of calcium carbonate and a bunch of other minerals—similar to oystershells and limestone found in rock formations in some mountain regions. Calcium carbonate is not easily dissolved in water—unless you add an acid. To release those minerals from an eggshell, you can add vinegar, citric acid, or carbonic acid & 1/4 eggshell (pulverized to powder – ~3g) in a 1L bottle. The eggshell dissolves resulting in calcium acetate, calcium citrate or calcium bicarbonate (+whatever micro nutrients are also in an eggshell)—all forms of calcium which plants can use.

If you take a capful of the calcium solution and a capful of your pH down, then you can still lower the pH of your tap water to ~5.8, while also increasing soluble calcium.

Should you do this, the first watering the week following this calcium application should just be a flush of tap water with no fertilizer or nutrients to clear out any residual calcium before you start your standard feeding.

(Video) A Study On Lowering Soil pH With Vinegar

Eggshells have value for plants

A hotly debated topic, some people recommend eggshells, others argue against their use in the garden. For me, the science is pretty cut and dry. Eggshells can be valuable. They’re made of calcium carbonate and release calcium under acidic conditions – and they can buffer the pH if the water or potting media becomes too acidic or too low in calcium—that’s a win especially if your water is too soft or too pure (ie. RO water). If the water is alkaline or already high in minerals, then the eggshells won’t dissolve (unless you add an acid like vinegar or citric acid). In nature, rain water (carbonic acid) along with other byproducts of natural decomposition (acetic, gluconic, glucuronic, citric, L‐lactic, malic, tartaric, malonic, oxalic, succinic, pyruvic, and usnic acids) all naturally dissolve calcium carbonate making new soluble (and plant-usable) forms of calcium. Bacteria and fungi consume decaying materials, produce those acids and decrease your potting mix pH. Adding eggshells can prevent the pH from diving too low and they provide calcium in the process. So…you can either add them directly to your potting mix (which means eventually they kind of become a bit of a sludge) or dissolve them in a weak acid and add them to your water (at a very dilute ratio).

Why add eggshells? For Calcium! For plant health! For good leaves, roots, and growth.

Calcium is a vital macronutrient that plants need but it’s non-mobile (the plant can’t reposition it from old tissue), so you have to continuously provide it as the plant grows. Calcium deficiencies in plants are common especially when growers use inorganic potting media, or a potting media which is low in calcium (like peatmoss or bark). A calcium deficiency typically isn’t immediately obvious, but instead presents as secondary problems such as: fungal and bacterial infections (AKA ‘leaf spot’ and root/leaf/crown rot) and pest problems – plants use calcium internally as an alert/response trigger to deal with pests and because it’s a fundamental building block of the cell walls, it’s integral to the plant’s health and resistance to pathogens. Calcium is also rarely included in synthetic fertilizers, so eggshells are a quick and easy way to feed your plants calcium naturally.

Consider this test for yourself

Science experiment: Take a 16oz glass of vinegar and put an egg into it and leave it for 24h—the eggshell will completely dissolve overnight as the calcium carbonate is converted to calcium acetate.

But is vinegar an ‘natural acid’? Yes – and you can read all about how vinegar is made here. But do you know what sauerkraut is? It’s pickled cabbage. Do you know how it’s made? Fermentation! By bacteria and yeasts converting sugars in the cabbage leaves to alcohol (which oxidizes to become acetic acid), or by directly producing acetic acid in the case of some bacteria – AKA ‘vinegar’ – and pickled leaves. Aerobic decomposition of sugars in nature (like when leaves, fruit, or tree sap decompose) produce acids too. If you’ve ever fermented kombucha (tea leaves & sugar) or made wine/beer the same thing happens. All of those processes that drive fermentation for our foods, also produce acids at large-scale naturally—and it’s happening everywhere in nature…on trees, in the dirt, on rocks, on fruit hanging on trees, on leaves, all over the place in a never-ending cycle of decay and acidification.

(Video) Natural Way to Lower PH For Your Cannabis Plants Using Peat, Humic Acid Benefits

Is carbonated water natural? Kind of…when water evaporates and condenses into clouds and rain, it interacts with the atmosphere, creating carbonic acid. Rainwater has a pH of 5.5 because of carbon dioxide and it is a catalyst for breaking down calcium carbonate in nature. It’s how erosion works and is often why plants can grow in highly alkaline areas like the Rocky Mountains and limestone regions of Malaysia and the Andes in South America—because the rain is acidic and the earth pH is alkaline, it creates a pendulum of pH variation ensuring the plant can get access to nutrients and thrive in more alkaline conditions.

Carbonating water (with a soda stream) is a rapid way to create carbonic acid in our homes and it will drop the pH of your water to about 4.5pH. Beware: if you’re buying bottled carbonated water, make sure it’s <10ppm total dissolved minerals – sometimes companies add sodium to their sparkling water(12mg/L [Perrier], 32mg/L [Pellegrino] to 118mg/L [Grolsteiner]).

Test it for yourself: take a glass of water, carbonate it, let it go flat. Test the pH. Drop an eggshell (measure the weight first) into the water overnight. In the morning, test the pH again, and check the after weight measurement of the eggshell. You’ll see that it lost mass and the water pH increased.

Want to know more about eggshells?

The value of eggshells & vinegar…


How do you use citric acid as a pH down for plants? ›

You can add 1mL of Ctiric Down per gallon of water or nutrient solution and mix well. Check the pH of your solution and add more Citric Down (if needed) until you have reached your desired pH level. Saturate your soil with the solution. You can check soil pH with a soil test kit.

Can I use vinegar to lower pH in water for plants? ›

Most nutrients needed by plants are most available in the soil at a pH between 6 . 0 to 7.5. Because of this, most garden plants grow best in this pH range. Watering with vinegar is not a recommended method for lowering soil pH for a couple of reasons.

Can you use citric acid to lower pH in water for plants? ›

However, a little acid can be added to a fertilizer stock solution to drop the pH of the water to help the fertilizer to dissolve. Often, citric acid is used for this purpose since it does not provide nutrients that can form precipitates.

What is the pH of humic and fulvic acid? ›

A pure liquid Humic Fulvic Acid product (e.g. one that is not mixed with NPK, etc) with a high proportion of Humic Acids will typically have a pH close to 11. A product that is high in Fulvic Acids will usually have a pH around pH 6 – 7.

How much citric acid to add to lower pH? ›

Citric acid is a natural additive that will drop the pH of your tea. The exact amount will depend on your water type, but generally, 1/4 teaspoon per gallon of water should lower a gallon of water by 1.0 point.

What is the best way to lower pH in potted plants? ›

Soil pH can be reduced most effectively by adding elemental sulfur, aluminum sulfate or sulfuric acid. The choice of which material to use depends on how fast you hope the pH will change and the type/size of plant experiencing the deficiency.

How much vinegar does it take to change the pH of soil? ›

Alkaline soils can be acidified with a solution of 1 tablespoon white vinegar per gallon of water used as a soil drench.

How do you lower pH organically? ›

Soil pH can be lowered by half a point—from 7.0 to 6.5, for example—by increasing soil nitrogen. Adding compost, manure, or organic soil amendments like alfalfa meal to the soil can help drop pH over time by increasing bacterial populations.

Does humic acid lower pH? ›

Adding humic acid to the soil changes its nutrient profile, affecting its pH. It doesn't lower soil pH; instead, it triggers changes in the soil that neutralizes its pH. After treating with humic acid, the nitrogen, phosphorus, and potassium content are increased, making the soil pH more ideal for plant growth.

Does fulvic acid lower pH? ›

Our study showed that fulvic acids (FA) significantly decreased the soil pH (Figure 2A). The acidity may have been the result of quinone groups such as carboxyl, phenolic, and hydroxyl groups that easily lower the soil pH [8]. Fulvic acid also influences the growth of soil microbial biomass and microbial activity.

What is the best pH down for plants? ›

pH Down (Acid)

To maximize plant growth, the pH of your nutrients should be slightly acidic. Experienced growers consider the ideal pH for most crops to fall between 5.5 and 6.5.

Is fulvic acid better than humic acid for plants? ›

Humic acids are large molecules that function best in soil to provide an optimal growing environment. Fulvic acids are much smaller molecules that work well in both soil and foliar applications, where they transfer vital nutrients through the cell membrane of plants.

Can you use fulvic and humic acid together? ›

Humic and fulvic acids work well together, with each providing its own benefits for better plant growth. Humic acid improves soil health and growth, while fulvic acid naturally facilitates your plant's absorption and use of available nutrients.

What is the disadvantage of humic acid? ›

Stay on the safe side and avoid use. "Auto-immune diseases" such as multiple sclerosis (MS), lupus (systemic lupus erythematosus, SLE), rheumatoid arthritis (RA), or other conditions: Humic acid might cause the immune system to become more active, and this could increase the symptoms of auto-immune diseases.

Does vinegar raise or lower pH? ›

Vinegar is acidic because of its low PH. Consuming it doesn't affect your body's natural pH levels, which stay stable unless you have an underlying medical condition.

How do you adjust pH with citric acid? ›

For pH adjusting, create a 50/50 solution of citric acid with distilled water (by weight!) and use single drops to adjust the pH, re-checking the pH between additions. (For example, combine 5g each citric acid and distilled water.) Take care not to inhale.

What is the pH of vinegar water? ›

Made with water and acetic acid, the pH level of distilled white vinegar is typically around 2.5.

How do I lower the pH in my soil quickly? ›

Two materials commonly used for lowering the soil pH are aluminum sulfate and sulfur. These can be found at a garden supply center. Aluminum sulfate will change the soil pH instantly because the aluminum produces the acidity as soon as it dissolves in the soil.

What happens to plants if pH is too high? ›

Plants only take up dissolved nutrients through their roots. When the media-pH is too high, micronutrients (especially iron) are less soluble and unavailable for uptake by plant roots. High-pH induced iron deficiency can develop within one to two weeks, resulting in chlorosis of new growth and overall stunting.

Can you use baking soda to lower pH for plants? ›

This is a cost-effective method that is quick and easy to do. Baking soda also does not last as long as lime (similar to the ashes) but can produce results in just a few days. Baking soda is fairly gentle on both the soil and the plants, so you won't have to worry about harming your plants.

How long does vinegar last in soil? ›

Even though vinegar is an acid, it breaks down quickly in the soil and, therefore, is not likely to accumulate enough to affect soil pH for more than a few days. Vinegar causes a rapid burn to plant tissue of susceptible species, so unintended injury is quite likely without knowing more information.

How long does it take to correct the pH of the soil? ›

Mix the liming source in the soil 2-3 months before planting. In order to get the best results, till the liming material into the soil about 2-3 months before planting in the fall or winter. This will give you plenty of time for the soil pH to change and for you to remeasure it.

What is the pH of citric acid in soil? ›

Given that citric acid has a pH of 2.2, it is also hypothesized that prolonged exposure of wheatgrass to the organic compound will increase the acidity of the soil.

What is the cheapest way to lower pH in soil? ›

The cheapest way to lower the soil pH is to add elemental sulfur to the soil. Soil bacteria change the sulfur to sulfuric acid, lowering the soil pH. If the soil pH is greater than 5.5, apply elemental sulfur (S) to decrease the soil pH to 4.5 (see Table 1). Spring application and incorporation work best.

Do coffee grounds lower the pH in soil? ›

Quick facts. Coffee grounds contain compounds that feed healthy soil but they don't lower pH.

Does Epsom salt lower pH in soil? ›

Derived from the breakdown of mineral rocks, Epsom salt is neutral in pH value and has no effect on soil pH levels when applied to soil in dry application or as drench.

What neutralizes pH in soil? ›

What Can Be Done to Correct Poor Soil pH? Overly acidic soil is neutralized with the addition of limestone (available at garden centers). Powdered or pelleted agricultural limestone is most commonly used. Don't overdo lime - it is much easier to raise pH than to lower it.

How can I make my soil more acidic naturally? ›

8 Ways To Make Your Soil More Acidic
  1. Add Sulphur to Your Soil. ...
  2. Add Compost to Your Soil. ...
  3. Add Leaf Mold to Your Soil. ...
  4. Buy or Make, and Add, Ericaceous Compost. ...
  5. Add a Mulch of Pine Needles. ...
  6. Add a Mulch of Cottonseed Meal. ...
  7. Use An Organic Liquid Feed on Your Garden. ...
  8. Use Acidifying Liquid Feeds Such as Vinegar/ Lemon etc.
Dec 2, 2020

What do you add to soil that is too alkaline? ›

Add organic matter.

The most organic way to lower your soil's pH level is to add soil amendments. Use organic materials like mulch, pine needles, sphagnum peat moss, compost, and coffee grounds.

Can you give a plant too much humic acid? ›

People will also ask if it's possible to apply too much humic acid to the lawn and the answer is no. You won't harm the lawn with too much humic acid but for sure, you will waste it. In other words, throwing down more than the labeled rate will not hurt anything, but it certainly is wasteful and expensive.

What is the difference between humic and fulvic acid? ›

Fulvic acids are those organic materials that are soluble in water at all pH values. Humic acids are those materials that are insoluble at acidic pH values (pH < 2) but are soluble at higher pH values.

How long does humic acid stay in soil? ›

Humic substances, on the other hand, are stable, long-lasting biomolecules. Components of humus have a mean residence time (based on radiocarbon dating, using extracts from non-disturbed soils) of 1,140 to 1,235 years, depending on the molecular weight of the humic acid.

What are the negative side effects of fulvic acid? ›

Fulvic Acid Side Effects

Fulvic acid helps detoxify the body, and in so doing may cause diarrhea, cramps, fatigue, headaches, or nausea. An overdose isn't possible, and it's completely natural.

What not to mix with fulvic acid? ›

Some immune system therapy drugs that you do not want to take fulvic acid in tandem with include azathioprine, basiliximab, cyclosporine and prednisone, among others.

What are the disadvantages of fulvic acid? ›

Autoimmune diseases: Fulvic acid might increase the activity of the immune system. It might therefore worsen some autoimmune diseases, such as multiple sclerosis, systemic lupus erythematosus (SLE), and rheumatoid arthritis (RA). People with these conditions should be cautious or avoid fulvic acid altogether.

What is the strongest pH down? ›

Sulfuric acid (from 20 to 98% pure): This acid is commonly used in car batteries and offers the largest pH dropping ability per unit of volume among all the strong acids.

What is the best acid for pH down? ›

Phosphoric Acid

The most commonly used pH down in the hydroponic industry, it will provide an extra source of phosphorus to a nutrient solution.

Do plants prefer lower pH? ›

A pH of 6.5 is just about right for most home gardens, since most plants thrive in the 6.0 to 7.0 (slightly acidic to neutral) range. Some plants (blueberries, azaleas) prefer more acidic soil, while a few (ferns, asparagus) do best in soil that is neutral to slightly alkaline.

Can I spray humic acid on leaves? ›

Humic acid can also stimulate plant growth by increasing the uptake of essential nutrients and improving fertilizer use efficiency. In agriculture, humic acid is used as a Liquid or foliar spray. It is applied to plant leaves to promote growth and protect against drought, heat, cold, pests, and diseases.

What plants are high in fulvic acid? ›

Foods highest in Fulvic acid will be those found growing in healthy soils such as Radishes, Beetroots, Parsnips, Carrots, Turnips, as well as foods grown in large bodies of natural water such as Seaweed and Kelp.

How do you apply fulvic acid to plants? ›

Fulvic acid can be used in a number of ways to improve plant health. It can be added to the soil, used as a foliar spray, or applied directly to the roots. When used as a soil amendment, fulvic acid can help to improve nutrient uptake and increase the overall health of the plant.

Do you apply humic acid before or after fertilizer? ›

Morning (before 9 AM) or evening (After 4 PM) are the best times to apply the humic acid solution. We suggest applying the humic acid right after spreading a microbe-feeding fertilizer so microbes will get the fullest benefit of humic acid.

How long does it take fulvic acid to work? ›

For a few days after beginning to take Fulvic acid, your body will begin to undergo a mild detoxification process that cleanses and revitalizes by removing toxin build up and flushing it out of your body. You may notice loose bowels or joint soreness as disease causing pollutants are gradually removed.

Is fulvic acid acidic or alkaline? ›

Since fulvic and humic acids are naturally acidic, a product which claims to contain these substances should have an acidic pH. Generally, fulvic mineral products with a pH that exceeds 3.0 contain alkalized or ionized water which can neutralize the fulvic acids.

What is the pH of humic acid? ›

The humic acids extracted from compost has a CEC of 60-156 me/100g, organic-organic C content of 20-30%, pH value of 6.0, in black color, and slow soluble in water.

Can humic acid burn plants? ›

Generally, humic acids reduce root burning which comes about through excessive salt concentrations in soils after fertilization. Also when humic acids are mixed with liquid fertilizers.

Does humic acid help with fungus? ›

Humic substances (HS) have a direct impact on living cells, causing a wide range of various biological effects, and stimulating or inhibiting fungal growth.

How do you make citric acid pH adjuster? ›

To adjust pH: A Citric Acid solution (50%) can be made by weighing an equal amount of Distilled Water and Citric Acid Raw Material. Gently add the Citric Acid into the water and stir well to mix.

How do you make a citric acid solution for pH? ›

  1. Prepare 800 mL of distilled water in a suitable container.
  2. Add 25.703 g of Sodium Citrate dihydrate to the solution.
  3. Add 2.421 g of Citric Acid to the solution.
  4. Adjust solution to final desired pH using HCl or NaOH.
  5. Add distilled water until the volume is 1 L.

Does citric acid decrease pH? ›

Citric acid increases the hydrogen ion concentration, resulting in a lowering of the ph.

What happens if you mix citric acid and vinegar? ›

As citric acid, is, as the name suggests, an acid then mixing it with vinegar is simply mixing two acids together. Generally, there is no reaction when you mix an acid and an acid. This means that nothing happens when you mix citric acid with vinegar.

Does citric acid work better than vinegar? ›

Is citric acid stronger than vinegar? No, citric acid isn't stronger than vinegar. The acetic acid in vinegar is a lot more aggressive and corrosive when it comes in contact with certain surfaces. But, there are many types of mineral deposits that citric acid can better deal with.

What is the best chemical for pH adjustment? ›

What chemicals are used to adjust pH? Sulfuric acid and sodium hydroxide (caustic) are most commonly used for neutralizing acids or bases. Caution must be used for pH adjust applications as an exothermic reaction will occur generating heat. The more severe the application the more heat generated.

What is the pH of citric acid vinegar? ›

Vinegar is a solution of acetic acid in water, usually at about 5 percent, with a pH of 2.4. Lemon juice contains ascorbic acid and citric acid, with a pH of about 2.3. These weak acids work best in attacking stains that are bases. Consider water scale.

What is the recipe for citric acid solution? ›

To Make a Citric Acid 10% Solution: Combine 10 grams of citric acid powder with 100 grams of water. Whisk to dissolve and bottle. To Make a Malic Acid 10% Solution: Combine 10 grams of malic acid powder with 100 grams of water. Whisk to dissolve and bottle.

What is the pH of 100% citric acid? ›

the pH of a 1 mM solution of citric acid will be about 3.2.

How do you bring pH down in soil organically? ›

Well-decomposed compost helps lower the pH of garden soil over time. Amending your soil each season with compost, which is rich in organic matter, is by far the best way to make your soil more acidic because it is done gradually and creates the most benefits for plant growth.

What is the disadvantage of citric acid? ›

Still, there have been reports of sickness and allergic reactions to the additive. One report found joint pain with swelling and stiffness, muscular and stomach pain, as well as shortness of breath in four people after they consumed foods containing manufactured citric acid ( 4 ).

When should you not use citric acid? ›

Citric acid has corrosive properties and should not be used on natural stone or marble. The acid can break down the coating and leave a cloudy appearance.

Does vinegar lower pH? ›

While vinegars likely won't affect your body's pH, regular consumption may have other benefits. Here are some potential benefits of vinegar: May kill harmful bacteria. The acidic properties of vinegar make it a great cleaning and disinfecting agent.


1. What Is Fulvic Acid?
(AgTonik LLC AGT-50 Fulvic Mineral Complex)
2. NPK-University Organic Biostimulants With Harley Smith
(NPK Industries)
3. Humic Acid for Lawns
(How To with Doc)
4. 🌹 Change Dirt to Soil w/ Humic Acid Fertilizers from Great Big Plants
(The Rose Geek)
5. "Acid Alkaline Balance" by Barbara O'Neill
6. Plant Extracts Are Bio - Stimulants (Part - 1)
(Perfect Gardens)


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Last Updated: 08/04/2023

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Name: Dan Stracke

Birthday: 1992-08-25

Address: 2253 Brown Springs, East Alla, OH 38634-0309

Phone: +398735162064

Job: Investor Government Associate

Hobby: Shopping, LARPing, Scrapbooking, Surfing, Slacklining, Dance, Glassblowing

Introduction: My name is Dan Stracke, I am a homely, gleaming, glamorous, inquisitive, homely, gorgeous, light person who loves writing and wants to share my knowledge and understanding with you.