AsNoriuanswered grow question 3 days ago I found even 20% is almost verge of needed. no feed for first 3-4 weeks, but i grew in big pots of soil and All-Mix, same Biobizz. Was always adding 1 cm top up during first week of flower. So , YES, i would reduce and/or start way later, than manufacturers info says about that line, BUT organic fertiliser works kind of slow, so plan a week upfront.