PharmaZanswered grow question 7y ago Hey man, itās time to move your light closer to the plants or vice versa. Theyāre probably stretching for light. canāt see a pic upload one.
If youāve got an adjustable ballast you can turn it down till they grow a little if not donāt lower it too far. 50cm will be fine, Iāve had my HPS much lower than that.