What way are you working it are you mixing the dry amendments through the whole Coco or just the top half . And are you adding anything else also how long does one amendment last before needing top amendments and how are you storing it . I tried organic amendments with soil on my first grow but switched to synthetics in flowering really just to try different things out on my first grow. Not enough experience with it to have an opinion. I myt go down this route on my next grow . I did have an issue with storage though I kept sealed in the bag it came in and out into a sealed plastic container . Within 2 weaks it was covered in mould
I store what is left over of my soil in a big plastic bin with a lid, that mold you are seeing is probably not mold but the microbial life (this is a good thing)
I mix in batches and depending on the stage of growth. For instance, this grow is just a single plant and I'm currently in a 1gal going to 7gal.
For the soil mix for seedlings, I just mix 1 gal of soil and 1 Tbsp of Dr.Earth Homegrown and 1 tbsp of Premium gold and plant them in a red solo cup.
when I went to 1 gallon I added 1tbsp of each to what was leftover (so making it 2tbsp of each) and threw half of a solo cup of earthworm castings and then transplanted using Mykos after a good mix.
This usually feeds until my next transplant, I supplement using blackstrap/seaweed/Dr. earth pot of gold, sometimes som recharge and sometimes just pure water depending on how the grow is going. This helps feed the soil (microbe foodz), not necessarily for the plant.
I only water 5-10% of the pot size (so for a 3 gal I would water only .5 - 1 liter) with no runoff.
Ill be going --> red solo --> 1 gal ----> 3 gal ----> 7 gal
the final pot will be a 2tbsp homegrown, 2 tbsp prem gold, earthworm castings and I will mix only 4 gal since ill have a 3gal pot already.
after about 3-4 weeks (based on your judgment) I top dress with a 60/40 mix of Dr. Earths Home grown and flower girl to prep for flower
ex: a 5 gal pot would get 6 tbsp homegrown, 4 tbsp flower girl)
another 3-4 weeks I top dress a 60/40 of flower girl and homegrown (should be into flower by now) the timeframe is all based on your veg time btw!
then another feed 3-4 weeks (based on your judgment 70/30 flower girl and homegrown, and this should be the last feed
I WAAYYYYY overexplained hahah and its probably really confusing, I am shit with explaining things.