Hey Growmie :) Your plant looks great 😍. It is a bit dark and looks good in the feed :-) I would water the next 2 castings with pH corrected water and only then with half the feed :-). When the plant is ready, you can look at the trichomes with a microscope. If the trichomes are about 80 percent milky and 20 percent clear, you can start flushing. If about 60 percent are milky and 40 percent amber, you can harvest. Then it's a very good high 😎👍😍