AsNoriuanswered grow question 10 months ago Gaja is slow release, you should not use it so soon to harvest.
I used similar line, from Ecothrive, normally last top up happens on 2-3 week of flower and naturally is all used up by end.
In summers i did huge waves of flush, its hard in soil, i would not recomend anyone to do any kind of flush with soil grows, just preplan how you feed.