imo it really depends on whats in your soil as to how often and what you need to bump(feed it) it with.But as a baseline Id say twice a month with a basic mellow tea.but I ran nutes with my TD grow early last yr.So,not sure to be honest.I know they can be a bit of a heavy later in their life.hope this helps you decide.Just keep it mellow and every few waterings hit it.thats my 2 cents brother.I very little about LED's though so you may wanna ask The LED help line maybe or the AFn 24/7 general help line.Excellent info there.
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