Frodoanswered grow question 4 years ago As for the leaf, it is a slight excess of nitrogen, slightly lowers the nut. For the berry, if the plant "collapses" before closing the lights, no problem. If this persists for more than 1-2 days, it is stress due to too strong lights, in which case raise the canopy by 15 cm. For safety I would check the ph output from the plant.