Lemonhaze Outer Edge of Leaves Curling Upwards - Anyone Have Any Suggestions?

This is Lemonhaze and every Lemonhaze plant I have is having the outer edge of the leaves curl upwards like in the photo. Anybody have any idea what the problem is?

This is not happening on any of my other strains so it seems to be Lemonhaze specific.

My setup:

T-5 light is about 4 feet from the clones
85 degrees in veg
50% humidity
Incoming ventilation
Using Advanced Nutrients - Sensi Grow A & B, B-52 and Voodoo Juice

Any feedback is much appreciated. Thanks guys and girls!

Check your Ph

it's from heat

There's two cases : Heat Stress gives this
Light Burn gives This

Find a way to lower the temperature and/or increase the circulation in the grow room or grow area if heat is the problem. Having a small fan blowing over the tops of your plants will help prevent hot spots from forming directly under your grow lights. If your marijuana plants are just getting too much light, try removing some of the lights or moving your lights further away from the tops of the plants.
When learning how to weed, it's best to try to keep things at a comfortable room temperature at all times for optimal growth. If it's too hot for you, it's probably too hot for your plants.

usernamessuck said:

This is Lemonhaze and every Lemonhaze plant I have is having the outer edge of the leaves curl upwards like in the photo. Anybody have any idea what the problem is?

This is not happening on any of my other strains so it seems to be Lemonhaze specific.

My setup:

T-5 light is about 4 feet from the clones
85 degrees in veg
50% humidity
Incoming ventilation
Using Advanced Nutrients - Sensi Grow A & B, B-52 and Voodoo Juice

Any feedback is much appreciated. Thanks guys and girls!

View attachment 2861290

Click to expand...

Well 85 is a little high...I run mine at 75-80 and no higher...and bring that T5 down on top of them, like about 6 inches over them if not closer...put your hand on top of your plants, if the back of your hand is hot then so are they...put a small fan blowing softly on them...and how old are they and how much nutes are you using?..full strength or less? hopefully less if they are young clones...and a pic of the whole plants would be good, can't really tell from a leaf...it could be over nutes or heat stress...fill in the blanks and we'll see if we can help...good luck and welcome to RIU...

I don't think it would be light stress as I have 2 T-5's in a 9 x 9 room. I am feeding at about 40% of the recommended amount of Advanced Nutrients. I will post a pic of the whole plant tonight. The clones are approximately 3 weeks old. I do have 2 fans circulating air in the room as well.

i try to keep my plants in the 70's most of the time, a little cooler at night. people that run co2 generally keep their plants 80-90. 85 is too hot for most plants without co2. too much nutes could make it worse, but the heat is an obvious source of leaf cupping. your not going to get light stress from t5's unless its like .5 in from the bulb, and even then it's probably the heat from the bulb literally burning the leaf. t5's just don't produce very intense light. hth & gl