I feed every time M8 no plain water apart from first week.. I use AN sensi grow and bloom.. rhizotonic.. plant magical cal cal mag and green planet massive to try and swell the buds. I never go above 1ml per litre on the grow and bloom.. rhizotonic at 1ml per litre and massive at 2ml per litre. Is she an autoflower your growing?? They can take a feed every time.