I only hit my plants once with a guano tea made from worm castings, high P-K bat guano, kelp meal, and a tablespoon of molasses that gets aerated for 24 hours.......usually day 30-35 of flowering if it is a 8-9 week strain. The super soil keeps em happy usually til the end....some of the heavier feeding TGA strains I bump up to 70% SS / 30% normal soil however. Been real happy with every QT I've grown. My profile picture is a qrazy that I grew last year from seed. Do note that the above plant was a clone....vegged her for 2 weeks (19 days total including rooting time) then put her into 12/12...trimmed the bottom 1/4 of the plant away around day 12 of flowering to get that nice big top