is this light burn/heat stress or some kind of deficiency?

The leaves near the top of my plant are starting to show yellow edges and tips, some of them are also curling upwards, is this from light burn/heat stress or is it something else, its being grown under cfls by the way which are about one to two inches away from the plant. Any help is much appreciated, sorry for the bad quality pics. Don't have a camera at the moment.

I'm not a CFL guy but suspect they are too close. Leaf edges up is a strong indicator of too much heat or light stress. Good luck!

Bugeye said:

I'm not a CFL guy but suspect they are too close. Leaf edges up is a strong indicator of too much heat or light stress. Good luck!

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Yep have to agree I have CFL atleast 6 -8 inch off

Ok cool, thanks a lot guys, ill move them back and see how it responds.

Good practice I use is to hold the back of your hand the distance away from the plants for 10-15 seconds. If it's uncomfortable for you the it's uncomfortable for your plants.

I keep my 250w about 5 inches away

If its not the lights it could be these cant load pics so i cant see problems

One wind burn
Edges Appear Brown or Burnt

Yellow Leaves - New Growth



Dark or Purple Leaves

Brown or Dark Spots

Leaf Symptoms:

Upper Leaves / Newer Growth Affected

Leaf Edges Appear Burnt

Spots

Twisted Growth

Abnormal Growth

Leaves Curl Under

Leaves Curl Upwards

Wilting / Drooping

Plant Symptoms:

Twisted Growth

Leaves Curl Under

Plant Wilting / Drooping

Are tips/edges of leaves brown or burnt?:

Yes

Copper deficiency
Leaf Color:

Edges Appear Brown or Burnt

Pale Color Leaves

Yellow Leaves - New Growth

Yellow Leaves - Lower, older leaves

Yellowing Between Veins

Dark or Purple Leaves

Red or Pink Color on Leaves

Leaf Symptoms:

Upper Leaves / Newer Growth Affected

Lower Leaves / Older Growth Affected

All Leaves Seem Affected

Leaf Edges Appear Burnt

Leaf Tips Appear Burnt

Leaf Tips Die

Slow Growth

Twisted Growth

Abnormal Growth

Leaves Curl Under

Wilting / Drooping

Plant Symptoms:

Weak Stems

Slow Growth

Twisted Growth

Leaves Curl Under

Other Symptoms:

Buds Not Fattening

I have CFL's on my mother and they are as close as a centimeter at times and i've never seen this before. I have good airflow tho. If it's a sealed environment CFL's will heat it up given enough time.

Cool thanks for all the advice guys, much appreciated, plant is doing much better now

helis said:

I have CFL's on my mother and they are as close as a centimeter at times and i've never seen this before. I have good airflow tho. If it's a sealed environment CFL's will heat it up given enough time.

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I agree, there's no way that a few cfl's are doing that. I'm not sure what specific deficiency might cause that but I'd check the ph of your water and soil.

Its not uncommon for leaves to touch CLFs for short periods of time and still be OK....