I'm still fairly new to growing and I wanted to find out what you guys thought might be the problem. If I'm completely wrong, please correct me.. like I said, novice here.

This is my only female left in my cab, she's 16 days into flower (day 58 overall), LST'd. I haven't had a lot of problems with her, a couple def. early in her life, but those got resolved and she totally bounced back and was looking great. However, I got a couple other problems arising now that I think might be a K deficiency. Or maybe a low soil ph? I know it's optimal at 6.8, and mine is kind of low.

The reason I think it's a K def. is because on the older leaves, the margins are yellowing, burning, then dying. The leaves are turning a kind of dark yellow, with some green left in the veins. I checked out Ganja Guerrilla's site, and a couple pics under the K section really show what my plant is doing. And I don't think it's a nute burn of any kind? Also, the newer growth tips are a little curled; the margins are slightly curled under. I wasn't sure if this was normal or not.

Or I think it might be a pH issue.. but I haven't changed anything with the water since she was a seedling, always tested pH, and everything has been fine up until 4-5 days ago. Is my soil pH really too low? And how would I correct it?

She hasn't been fed nutes since I flipped to 12/12; I only gave Epsom salts once since the 12/12 flip, and tonight I fed her some molasses (1 tbsp/gal).

Soil: Been in the same soil since 3 weeks old, had no problems with it. Scott's Premium (7-4-3 or something like that), 1/8 cup each of bone/blood meal, perlite. 10" pot
Soil pH around 6.2, but might be inaccurate
Tap water pH at 6.8-7
Temps: 83 day/74 night
Humidity: 35 day/50 night
She's under 6 - 42 watt of 2700K CFLs (250 watts total)
Good ventilation and air circulation

Any help is appreciated!!
bron.y.aur babe Reviewed by bron.y.aur babe on . Potassium def., or something else? [pics] I'm still fairly new to growing and I wanted to find out what you guys thought might be the problem. If I'm completely wrong, please correct me.. like I said, novice here. ;) This is my only female left in my cab, she's 16 days into flower (day 58 overall), LST'd. I haven't had a lot of problems with her, a couple def. early in her life, but those got resolved and she totally bounced back and was looking great. However, I got a couple other problems arising now that I think might be a K Rating: 5