Shagrathanswered grow question 4 years ago Hi there!
I always add fulvic and humic acids to my foliar feeds except when I give seaweed.
So basically you can give 'em quite often but don't use too strong solutions 'cos too much anything aint never a good thing, but I have not seen any negative effects on these. I use Aptus Humic-and Fulvic blast and the dose is 3ml/10l or roughly 1ml/gal.
I use seaweed as foliar only when l want to ease stress from heat or pruning and when transitioning to flower it is really useful but should be used like once a week.
Seaweed is 10-20x effective when used as foliar so you dont need much and not often