The Dreaded Claw....

[ButchieYost2001]

3 bigguns 9 weeks into flowering, upcurling fan leaves....

soil
ff nutes
water 2x/week - 1 water/1 nutes

[daihashi]

3 bigguns 9 weeks into flowering, upcurling fan leaves....

soil
ff nutes
water 2x/week - 1 water/1 nutes

Fill out the troubleshooting form.

In the mean time:

1. What is your temperature at the canopy?
2. What is your soil run off PH?
3. When was the last time you repotted?

Upcurled leaves like that start off with just the edges curling. This is an indicator of heat stress; however your other plants look fine (leaves not curled up). It appears to be a ph issue to me.

Please fill out the troubleshooting form and I'm sure someone can help you.

[stinkyattic]

High heat combined with low humidity. Is that the plant directly in the line of a fan, or closest to a large lamp?
Point fans AWAY from plants so that air still circulates but does not strip any nearby plants of moisture.