It's not slow release as such ...
Otherwise I wouldn't use it for seedlings/starters
I don't grow full term indoor with soil mixed with perlite i do start and sometimes veg plants for 6-8 weeks before putting outside ...I don't feed anything to the soil except for eco sea weed and for anyone doing indoor with soil I would recommend this medium.
I experimented growing a Pakistan valley kush (100%indica) in this soil from start to finish in a 60 litre fabric pot outdoors full term.
I didn't feed the plant anything at all until the 10th week in veg and only then it was go go juice and eco seaweed.
In flower I used just maxsea bloom in small doses but regularly.
This plant yielded about 9 oz if I remember right.
Awesome taste and high and the terps were 9/10 after a lengthy cure.
To me this soil is to good for chillis and he goes but perfect for weed.
I'd recommend a moisture meter to check when using this soil to water as it always looks black and wet and can fool you into thinking it doesn't need a drink.
I say no more except u can try any soil u like but I've just given u a tip that can save couple grows if learning to find.
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