curling and discoloration

my.little.pony

Active Member

• Dec 6, 2008

• #1

It's been 2 weeks and 4 days. This morning when I looked at my plants, they all seemed to have a yellow/brown discoloration at the tip of their biggest leaves (the second pair). They almost look a little burnt or crispy. On top of discoloration, two of the plants have each a leave which is curling upwards.

They are growing under 2 32w fluoro's. They are about 2-3 inches away from the light, and it is not hot when I put my hand under the lights (so i can't see how they would be burnt).

I have not given them any nutes yet either. Perhaps its a Nitrogen deficiency?
I also transplanted them thursday (2 days ago), which may have caused some shock.

What should I do to fix this?

 

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brasmith

Well-Known Member

• Dec 6, 2008

• #2

A simple transplant will not burn your leaves like that. So it has to be a soil issue, what type of soil are they in? Is there an npk ratio listed?

 

my.little.pony

Active Member

• Dec 6, 2008

• #3

I got the soil from a nursery. It's an organic mix with no fertilizers or slow releasing ferts either. I looked up online and did some research on how to mix my own soil mix (I can't remember how much of each), but there's mostly part soil, perlite, vermeculite and very little peat moss. We transplanted them into the same soil mixture as they started to grow up in.

I didn't think it was the transplant that caused anything, i was just suggesting that it might have helped create the problem.

Thank you

 

brasmith

Well-Known Member

• Dec 6, 2008

• #4

Your soil sounds healthy. They look like they have the beggining signs of ph spotting. Do you have a way to test your ph? Here is a ph chart that may help you out.

 

panta

Well-Known Member

• Dec 6, 2008

• #5

u got something resembling my problem

http://images.google.com/imgres?img...tomato+leaf+chlorosis+picture&um=1&hl=en&sa=X

https://www.rollitup.org/marijuana-plant-problems/132382-deficency-nute-burn-diagnostic.html

 

my.little.pony

Active Member

• Dec 6, 2008

• #6

They haven't had any problems occuring before this one. We haven't changed anything. Including water.

so what should i do. I dont have a Ph meter right now, are there any other possible solutions or is a ph meter a must?

 

my.little.pony

Active Member

• Dec 7, 2008

• #7

anyone have any ideas?

 

panta

Well-Known Member

• Dec 7, 2008

• #8

use soil without nutes in it,and u got to get a ph meter

https://www.rollitup.org/advanced-marijuana-cultivation/126892-i-need-help-poste-5-a.html
u can see in my post what kind a problems im having maybe it helps,looks a lot like yours

 

sdboltdude

Well-Known Member

• Dec 7, 2008

• #9

are you using tap water ph migt be big factor use a ph meter $15 well worth it and use filtered water it wont hurt to raise light just to be safe..is you running any fans? to circulate air? good luck

 

my.little.pony

Active Member

• Dec 7, 2008

• #10

panta said:

use soil without nutes in it,and u got to get a ph meter

Click to expand...

the soil does not have any nutrients in it. it is organic, and nothing else added.

I will move the lights up a bit. I will try and get a ph meter as soon as possible. will this cause the plants to die in a day or two if i dont have a chance to get a ph meter?