This happened two days after going outside

anyone seen this or have any clue to what it could be? I have a feeling it's cold damage but no sign of it on the others. Cropkings white cookies and growing in straight promix. Temps dropped to around 5 Celsius give or take. Just want to make sure it's not bugs or some kind of deficiency. Water ph consistent around 6.5 - 7.0

I don't know about the cold, I just see a slow down in growth and some purpling when I let them get to low 40s. I'd guess she is just stealing a little magnesium from the bottom leaves.

Bugeye said:

I don't know about the cold, I just see a slow down in growth and some purpling when I let them get to low 40s. I'd guess she is just stealing a little magnesium from the bottom leaves.

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hmmm maybe a little bath is in order. I'll try a blast of Epsom salt perhaps