Thin curling leaves

Hey Guys,

I have 3 strains going:

Rock Lock
Bubba Kush
Lemon Skunk

They are all at the same size and about a week and a half into flower. The Rock Lock and Bubba Kush are going great but the Lemon Skunk is curling under at the top and parts in the middle and lower leaves. At first I thought it was heat related but the other 2 arent showing signs of this and i put my hand at the top of the plant and there is no heat. Also it is at the bottom and middle in areas too, which is getting little light. They are dark green and very thin.

I am not feeding nitrogen anymore since they are in flower. I already tested my PH runoff which is 6.4 and I have a fan aimed at the middle of the flowers. I am using 3 gallon containers and fox farm ocean forest.

I am using a hortilux 400W HPS my temp is around 80 and my humidity is 40 give or take. good air flow and ventilation also.

Not sure what else to do. Any ideas?

got any pics?

Here is a picture

too much nitrogen?

Chances are that all of are going to head in the same direction within a couple of days. Have you ever flushed your system ? And how far is light ?

i am not adding nitrogen at all and havent for some time. I just yesterday started adding nutes at 1 -10 - 0.2 bat guana. Before that it was in veg with just fox farm ocean forest. light right now is about 12 inches away but off to the side. light is hanging in the middle of my tent and the plant is now closer to the corner. weird thing is it is curling in places all over. like the middle and lower where there is no heat at all. its like half the plant is good and the other half is curling like the picture

oh and yes i flushed it a week or so ago

will this effect the bud?

how good is your exhaust and fresh air? I had a problem with that and i got co2. See my plan was to balance my 2 rooms temps with each light. I didnt have a problem cooling the room, i had a problem keeping the room hot enough. So i exhausted the lights into the rooms. Well i quicky proved to myself my rh was really high and temps were getting a tad high. I made some adjustments, and the main thing i did was invest in c02 boost. and i havnt had a problem since. fairly cheap and lasts 3 months, i saw a huge improvemnet and really quick turn around. C02 is your best friend. When i ahve the money im going to invest in co2 system. This im competely sure of

I have to CO2 gallon bottles going with hoses going into my fan to spread the CO2 evenly. My exhaust and fresh air are really good and my temps are good as well. I am at a loss here

I grew lemon skunk twice and in one grow I had 'the claw.' It looked just like your pictures. I had four different strains going at once and got lazy and was feeding them all the same and the lemon skunk ended up with nitrogen toxicity.

My guess is your lemon skunk is suffering from the same thing.

I cannot tell from your picture but is the leaf color a deep dark green? Does your lemon skunk seem a bit thirsty looking but not sucking up water like mad, like the leaves are not full of moisture but not actually dried out like they have been nute burnt? Does it seem to be maturing a bit slowly? Does the stem seem to be just a bit weak near the top of the plant(s) but growth is lively? Is there twisting of the leaves besides the 'claw' look?

ah the famous claw...... its definately a nitrogen toxicity. just flush flush flush flush if you havent done so already. And by all means do not add anything else it will only make it worse.
as far as the ocean forest mix, did you add dolomite lime to the mix? if not you might want to add dolomite lime as well to the mix. I used to have the same "eagle claw" on my lsd (barneys farm not lemon sour diesel) and it turned out to be i had a nitrogen toxicity, so i flusehd her really well and added dolomite lime to the soil, i did not add as any nutrients for about 2 weeks (played it safe) and she came out of it.

Brick Top said:

I grew lemon skunk twice and in one grow I had 'the claw.' It looked just like your pictures. I had four different strains going at once and got lazy and was feeding them all the same and the lemon skunk ended up with nitrogen toxicity.

My guess is your lemon skunk is suffering from the same thing.

I cannot tell from your picture but is the leaf color a deep dark green? Does your lemon skunk seem a bit thirsty looking but not sucking up water like mad, like the leaves are not full of moisture but not actually dried out like they have been nute burnt? Does it seem to be maturing a bit slowly? Does the stem seem to be just a bit weak near the top of the plant(s) but growth is lively? Is there twisting of the leaves besides the 'claw' look?

Click to expand...

The leaves are very dark green and yes some of the plant looks thirsty and other parts look great.

It has been in Veg for about 3 months due to a spider might problem. It was only a few inches for the first month or so. Once I took care of that it started going well, it is almost 2 feet now. But it has been in the Ocean Forest for about 2 and a half months so I know there are no nutes left in it. Plus I just added some Guana for the first time the other day at 1 - 10 - 0.2.

I have flushed before but maybe I need like a very intense flush. I will try that again and see what happens. thanks guys

oceanic6 said:

The leaves are very dark green and yes some of the plant looks thirsty and other parts look great.

It has been in Veg for about 3 months due to a spider might problem. It was only a few inches for the first month or so. Once I took care of that it started going well, it is almost 2 feet now. But it has been in the Ocean Forest for about 2 and a half months so I know there are no nutes left in it. Plus I just added some Guana for the first time the other day at 1 - 10 - 0.2.

I have flushed before but maybe I need like a very intense flush. I will try that again and see what happens. thanks guys

Click to expand...

Nitrogen toxicity causes a plant's vascular system to break down and that means the pathways that carry moisture and nutrients can't do their job as needed by a plant. People tend to feed fairly heavily in veg trying to get all the vegetative growth they can out of their plants but the plants do not use all of what is given them so there is a buildup of some nutes in the soil. Nitrogen levels that are high for long enough, but not always high enough to cause burn, damage the plants. Sometimes it won't show up until when in flower and that baffles people because they have switched to flowering nutes by then and don't think they could be feeding their plants too much nitrogen, but the buildup happened in veg and even with the lower N ferts in flower they end up with a problem. Some plants are just a bit more sensitive and it seems Lemon Skunk is a but more sensitive to N than some strains are so they need a lighter feeding to remain healthy.

It might be a single phenotype of Lemon Skunk that is more sensitive. When I had my problem I had two phenotypes, one fairly indica looking and the other very sativa looking. It was the sativa phenotype that had the problem, not the more indica phenotype. The indica phenotype plants leaves looked a bit too dark green, so there was some excess, but the plants did not develop 'the claw' and after a flush and backing down on the nutes they were fine. The sativa phenotype plants leaves looked like The Creature From The Black Lagoon's claw and never fully recovered.

If spotted early enough flushing can help and a bare root transplant can also help, but again only if the problem is spotted early enough. Damage to a plant's vascular system can't be flushed away so removing the build up N and after that keeping it low might not do much more than keep more damage from occurring in some cases. You can only do what you can and hope for the best.

Given what you said about how you fed your plants it doesn't sound like you should have had the problem, but what happens with excess levels of nitrogen over time is 'the claw' and that is what I saw in the picture you posted, so however the buildup occurred, it had to have happened somehow.

yeah, maybe the fox farm ocean forest wasnt mixed enough and there was more N in that batch or something. Can the claw ruin the final product?