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We had some cold nights, and it went to the low 40s. I had pretty white hairs and they looked so good. But now the tips are black.
I know the temp range does not include 40s to grow but too early to harvest. It's been this way for about a week, and nothing is going on except the leaves growing...
I purchased a 4'x2'x5' tall grow tent. I wanted to get the 250w HPS but amazon I guess doesn't carry them and other places were out. Soo, I bought the 600w HPS with a ballast that has a 200w, 400w and 600w positions. I started a seedling with the 200w and it seemed to struggle. the burnt tips...
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