@Sensi Jay
How far are you keeping the cob from the girls?
I have noticed at normal led distance, they seem to cause light stress that appears like a heat curl, and i have too hang them much higher above.
It's about 18" though the main cola is closer to 12". I'm seeing a few rust spots but I put this down to maxing the organic 'nutes' as I've also got leaf tip burns. this is after only 3 pk booster teas, no more till harvest now.
BM mk3 coming along nicely on day 11:
One of the new leaf has a strange deformity but growth wise it's on point.
And I am in love with the main top on mk1 just looks as canna should, on day 59:
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