PRECISELY.
And you'd be surprised how often that adage is accurate.
Sprays, nutrients, fans, lights, pesticides, etc.
Personally what I do is use my old soil and compost. I've sorta noticed that the plants roots sorta consume the soil a lil, I know it sounds stupid, but I swear when I re-mix the soil it's more aeration that what I began with, maybe it's all in my head though...
For shits and giggles I germinated some seeds in pure compost, and they did perfect.
It's weird I KNOW the compost is loaded with nutrients, but it doesn't bother anything, I had a rootbound male that didn't indicate sex for a LONG ass time (tall-ass kali) so I've had it rootbound and apart from my reg grow, and it was yellowing up pretty badly, all I did was put a thin ass layer of my compost on the surface as a topdress, and about 7 or 10 days later the entire plant was green again, the compost has all sorts of nitrogen in it, alfalfa, fish meal, neem meal, insect mashings, doghair, beard shavings (I know i'm a kooky bastard), grass clippings, etc.
point is, if it's aged super long, doesn't burn a damn thing.
I know I sound like a broken record, but seriously fellas... a compost pile is fuckin the secret..
even more so than my wormbin (which is still irreplaceable)
