Upcoming Trouble?

Thanks for all the answers! I also did some research myself. indeed it looks like the onset of calcium / magnesium deficiency. I ordered CalMag from Biobizz. as soon as I receive it, I will immediately give it to all plants to solve the problem / use it preventively.

Hi @SunnyDays these spots are a sign of the start of a magnesium deficiency. apply calmag or epsom salt (2tsp per gallon )in a corrective dose. good luck mate 👍

Pump a little cal mag into it and you’ll be fine. The brown spots could be indicators of calcium deficiency. Happened on my plants. Not sure if you can see it my journal or not.

When a cannabis plant transitions from its vegetative phase to its flowering phase, it stretches a lot -- this requires immense amounts of energy and nutrients. If the plant does not have enough (mobile) nutrients available at the top, it will take these from the leaves, hence the light color. Leaves are batteries, of sorts. This will resolve itself once stretching has subsided, provided you feed your plant properly :) Brown spots are currently of no concern, and probably won't be in the future either. Your plant looks healthy.