what deficiency is causing this leaf curl?

Fist time seeing this...I'm guessing it's a nutrient deficiency of some sort but not sure. 2 out of 15 plants showing this--all Cherry Wines, in same soil and with same amendments/watering. The others are thriving.

Anybody know what particular nutrient she's asking for? Don't want to throw the kitchen sink at her.

That just looks like heat stress to me but some of the glossy blistery looking leaves has me wondering about mites

Im still going with heat

As bam said it looks like heat stress, if they get worse and begin to look like burritos then I would say probably a root problem. Plants are a little limey you may want to give a little Epson salt and a shot of nitrogen.

Agree look alittle light but even,wasnt sure if it was the strain

I see heat stress all the time. Of course it hasn't been under 110f here for like a month now.

bam0813 said:

Agree look alittle light but even,wasnt sure if it was the strain

Click to expand...

Bam makes a very good point, I jumped to nitrogen because of your color but could be the strain.

If you can green them up, it will make a world of difference when you begin to flower.

Thanks everyone.

I wondered about heat stress too except none of the others (same strain) are showing leaf canoeing and they're all in the same location.

Also agree the color looks a tad light, although not so much in photo #2. Before transplanting I amended the soil based on a lab test, including adding some feather meal for nitrogen and k-mag for magnesium. But it's possible they need more--they've been in the ground over a month now so I topdressed yesterday with more feather meal, plus some alfalfa meal and worm castings too. And added 1T/gallon Epsom salts to their water yesterday.

One thing that makes me think it might be a deficiency is that some of the upper leaves seem like the veins are dark green but the spaces in between are lighter. That combined with the leaf curl makes me suspect a mineral deficiency. Plus I'm not aware that a nitrogen deficiency would cause the leaves to canoe like that.

As far as mites, I'm not seeing any signs but then again I've never had to deal with mites before. I'll check the undersides of the leaves again, it's possible I'm missing something.

I had an Orange Blossom Special that had crinkly leaves last year, never fully solved that, but it thrived and produced beautiful buds. Maybe genetics are partly at work here?

But I'd love to solve this before flowering begins. Figure I've got another 4 weeks maybe...

Could your soil mix be a little hot?

Hang some shade cloth over her see if she responds.Some like it hot,some dont.

Crinkly leaves ive found to be just too hot of soil,perhaps too much compost or not quite fully broken down yet.Or too much alfalfa or another hot ingredient.

I think the epsom you added will help a lot,you can see a slight Mg deficiency in the one photo,hard to tell.

Different plants of same strain even in the same locations and conditions can react and cope differently imo

natureboygrower said:

Could your soil mix be a little hot?

Click to expand...

Maybe, but if that was the case wouldn't those leaves be dark green with the tips curled down?

myke said:

Hang some shade cloth over her see if she responds.Some like it hot,some dont.

Click to expand...

It's overcast today and relatively cool, she's still got the curl.

myke said:

Crinkly leaves ive found to be just too hot of soil,perhaps too much compost or not quite fully broken down yet.Or too much alfalfa or another hot ingredient.

Click to expand...

Possible, although the compost I added was a year old and I measured the amendments carefully based on the soil test recommendations.

myke said:

I think the epsom you added will help a lot,you can see a slight Mg deficiency in the one photo,hard to tell.

Click to expand...

That's my gut sense, she needs Mg or Ca possibly. But I'm still fairly new to this so not super experienced reading the symptoms.

NewEnglandFarmer said:

That's my gut sense, she needs Mg or Ca possibly. But I'm still fairly new to this so not super experienced reading the symptoms.

Click to expand...

See how she responds,change one thing at a time and youll figure it out.

And hey 2 out of 15 is pretty good,their female,one or two always bitch and complain lol.

myke said:

Hang some shade cloth over her see if she responds.Some like it hot,some dont.

Click to expand...

Not to highjack this thread, but I have a light that doesn't have a dimmer switch and it's too powerful for my vegging plants. Installing one seems to be a pain, so I was wondering about a shade cloth. Do you think one would work with a LED light as opposed to the sun? I know nothing about outdoor growing.