Heat, Nute Burn or Other? Pics attached

bebopson

Active Member
Hi All,
I've got a 6 week old Blue Streak (MDanzig's autoflower) exhibiting somewhat yellowed leaf edges. I don't know if it's because the grow box is too hot, too many nutes (was fine until a few days ago, using only water) or a specific nute deficiency. The plant has continued to grow denser buds during these last few days since the leaves starting ailing. The only other thing I did differently was that I harvested some rain water and fed it with that once or twice. I wonder if the water may have gotten stale in the barrel.

There is another indica of unknown provenance (safari mix seed) growing next to it that is as healthy as hell, but was a bit shorter at the time the problem manifested. The Blue Streak is a 10-week auto-flower so I've got about a month till harvest, more or less. Thank you for taking a look as well as any insight you may have.

As an aside, I'm growing in a Uhaul Grand Wardrobe box ($11.95) with a 125W CFL and reflector from HidHut, box painted white and the top is left loosely closed so air can move out, but there is no fan. I must say, this is a nice cheap little grow box which can be stashed in tight places.

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