Curling leaves... what' wrong?

[rr14]

The edges on the leaves of one of my plants is curling in slightly. check out the attached pics.

 

[rr14]

 

[Rosy Cheeks]

If the edges curl upwards, it's generally either heat stress or magnesium deficiency. I really can't say from your HPS tinted pictures.

 

[rr14]

makes sense. i think it's heat.

 

[Guest]

dude lets start with mag dif then move to nute burn and finish up with heat stress or burn...back off the nutes a bit and give some epsom slat or cal mag to help you mag dif. and get some ventilation going on in there

and a bit more info would be good also.

what are they in soil hydro. ventilation? light? lamp hieght to plants?

 

[Guest]

over fert, or to close to light

 

[Rosy Cheeks]

If it's heat stress, only the leaves close to the lamp should be concerned by the curl, primarily the bigger leaves. A (Mg) deficiency or overfert could show up anywhere (depending on what element causes the reaction), but often in lower, older leaves.

 

[gaiusmarius]

Hi rr14,

we really need mor info to give you a preciese answer. but the first thought would be heat stress and/or nute burn.

it all depends on the conditions in yur grow space. temps min max/ RH min max/ ferts and ph, how much ec, for how long. also what system are you uesing to grow with? hydro, coco or earth?

good luck
gm

 

[rr14]

I believe that it was heat stress. The nutes don't appear to be off. One night the temps got up to 85.6*. It hasn't happened since I started paying more attention to the temps again.

 

[mace_ecam]

Rosy Cheeks is right