Gday guys, just wondering of it is possible to overdo with fulvic? My critical kush girl is about 2.5 weeks in nearly finished stretch..shes showing burnt tips with ppm around 700? Ive been adding fulvic as a means to affect ph levels as I've run out of the usual stuff..my ppms aren't outrageous so is it possible to have too much?
If I remember correctly, fulvic acid is a chelater that aids the breakdown and uptake of nutrients. What does fulvic to to ph?
A few things to know about most commercially extracted fulvic acids. It should be some shade of yellow like apple juice, if it is dark and black you have a humic (and fulvic) product. Most water extract fulvic acids without any additives or extractants are around pH 3.0. Some manufacturers will use low grade ore and extract with phosphoric or citric acid this give it a low pH but in truth has very little fulvic. If you see any phosphate on the analysis (over 1% P) you typically are getting a cheap fulvic. Technically speaking fulvic does not chelate as much as complexes, but that is semantics really for your purposes. Fulvic solutions have a very high cation exchange capacity which helps to store and increase the availability of nutrients. Moreover, fulvic can affect plasma membrane H+ATPase activity and nutrient uptake like nitrate. So to answer your question directly, Keep your eye on pH, overly acidic solutions can cause problems like aluminum toxicity. Because of the increased nutrient availability a solution that was not "hot" can become so just by adding fulvic to the solution, which increases that availability of the nutrients that might cause burn. Last fulvic is a natural component of all decaying plant mater, fulvic is abundant in media such as peat and compost. You would find rich tropical areas with significant amounts of fulvic in the soil. These areas thrive rather than burn from the high amount of organic acids. To recap the fulvic is not causing burn, but the pH of the fulvic may cause toxicity and/or increase availability of salt based nutrients and cause burn. Hope that helps. *Yes, I am a professional in the field of fulvic manufacturing.
Nice post, I knew the basic fulvic = increase nutrient uptake thing but that explanation really gives it all context. Excuse me, I need to go take a look on the back of my fulvic product now...
My hydro shop gave me a bottle of very dark soy looking fulvic, with a printed label on front..i just went with it cos the guy knows his shit...now I'm a little worried about mystery bottle which obviously has humic too?!
