leaf edges curling

[razor ridge]

Ok using an organic soil mix, Promix, EWC, blood and bone meal, Azomite, kelp meal, high p bat guano, dolomitic lime...only effecting plants from clones

 

[prince kali]

first guess without knowing your fert schedule is heat..
do you measure the temperature at the tops?

do you have an oscillating fan blowing over the tops??

greets
pK

 

[Midnight]

Looks like heat stress.

 

[MrBlue2]

My West Coast Dog would do that when it was water stressed. it can also be caused by heat stress or toxic salt build up. It happens when the leaf is trying to dissipate moisture but is unable to.

 

[turtle farmer]

just did that to my garden last week------I changed the bulb,and lowered the light..
that was the only recent change----raised it up a little and everything is fine--My $0.02
tf

 

[razor ridge]

Ok thanks, no nutes to plants, probably a little of both heat and water, they were just transplanted a week ago so the roots haven't taken off yet, and were having a warm spell at the moment, temps one day will be in the 30's then near 70's the next, I grow in a cargo container outside. Welcome to Mid South NC weather....thanks for the fast replies