They do love nitrogen for sure but I use the same mix throughout with no transplanting and my seedlings (idicas seem more sensitive) will wrinkle horribly and otherwise show symptoms of way to much nitrogen. Also I flower after 1 week when they have their sets of 7 and thenitrogen seems to slow down the whole sexing process. The soil I use is 18% nitrogen, mixing 60% perlite is what I use for a nice airy soil that's not too strong. I have 25 little lads in a cabinet style sog with 600 watts of cfl if it matters
But I fully supprt all their products. I think I'm gonna run their perlite only on my next grow. Ill be tuned in!!