Leaf tips rolling upwards and dying margins

B

blaa

Member

• Dec 20, 2009

• #1

Alright the pictures are not actually taken at the same time and the problems might or might not be related. In the upper picture you can see the dead margins and in the lower the rolled tips. Also the tips of the rolled leaves appear to be kind of darker green and dry.

I have some ideas what the problem might be but what do you think?

 

smallclosetgrowr

Well-Known Member

• Dec 21, 2009

• #2

to much food

 

A

alpha hustle

Member

• Dec 21, 2009

• #3

Cant really see the colours on the pics but could be a magnesium deficiency?

 

smallclosetgrowr

Well-Known Member

• Dec 21, 2009

• #4

take a photo of the leaves head on , we cant see anything from those angles

 

smallclosetgrowr

Well-Known Member

• Dec 21, 2009

• #5

is it only the bottome thats effected?

 

B

blaa

Member

• Dec 21, 2009

• #6

The leaves are green, it's not mag deficiency. The rolling happens more towards the top, the margins in the bottom.

 

B

bigwheel

Well-Known Member

• Dec 21, 2009

• #7

Its either nute burn or too close to the light. I forget which right now. Just read it today. Think I may have short term memory loss. That is a sign of something but I can't recall what it is right now. Seems like it was nute burn like the other person say. Hope this helps.

 

B

blaa

Member

• Dec 22, 2009

• #8

It's certainly not heat stress. Nute burn, well the symptoms look similar. I only use organics (BioBizz) and have given so far about 2-3ml/1.5l of Grow and Bloom every watering. That doesn't seem excessive to me?

No one has yet suggested phosphorus deficiency?

The edges all around the leaves or half of the leaves can be brownish and work its way inwards a bit causing the part of the leaves to curl up in the air a bit. Sometimes the stems can be red, along with red petioles that can happen when having a Phosphorus deficiency.

Taken from http://www.icmag.com/ic/showthread.php?t=11688. Symptoms look quite alike to me. Stems and petioles are red/purple but that can be just typical for the plant tho.

Opinions?

 

smallclosetgrowr

Well-Known Member

• Dec 22, 2009

• #9

whats the npk on your nutes ?and how often are u giving that dosage u said about to them

 

sweetsmoker

Well-Known Member

• Dec 22, 2009

• #10

i would say thats a nute def not burn. when it burns it will happen all over the leaf not jus edges gradually with no feed the whole leaf will brown off i have suffered wit this as i grow in rockwool and am always undereasy wit nutes. also the foliage looks a bit yellow