Leaves turning Black week 9 - 12

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Snowchaser

Active Member
Hi, recently harvested and didn't take pics at the end (should have I know) but I didn't think it was bothering me that much.. I put it down to cold temps. Now that I've read a bit more I'm confused as to what it most likey was...
Grown in: Canna Coco w perlite mix
Food: Canna Coco A and B
Under Mars Hydro SP 250w LED light bar in 2x4 tent. Micro garden you could say. Most recent temps of a daytime read at 16C.
Mostly it was leaves on the top half of each plant and they started changing towards purple so I wasnt too concerned, but by the end they were black as black.
Question is.. nute deficiency? low P? Low K? Or possibly just crazy cold weather effects? The plants were too close to the lights at the top too, whoops.
Any ideas I'd love to hear it.. cheers
 
S

Snowchaser

Active Member
Sorry that’s my bad. I turned to the forum in desperation with no pics. I think there was a few things wrong. Temp was one. Deficiency another. If it happens this time (it’s still only about 14C here during the day) I’ll post pics here
 
S

Snowchaser

Active Member
Okay, next round of plants.. SAME problem, well I don't even know if it is a problem. Just same colour. I've taken a few pics this time. Please excuse the shit crack in my phone camera. I took a shot of the undergrowth to show how lush and green it is under there...
 
TheBlackHand420

TheBlackHand420

Well-Known Member
Looks really nice! I just went back too organic soil from coco perlite. Not that I didnt like it I'm just going cheaper and less watering.
 
SCM 831

SCM 831

Well-Known Member
Purple strains will turn purple at any temp, but even a strain that’s not purp can turn purple at lower temps
 
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