Leaves curling up a bit and dry on edges

Hook Daddy

Hook Daddy

Well-Known Member
Any idea what is causing the leaves to curl a bit on the edges? They are sour diesel growing in coco and perlite with a recirculating drip system, hlg 600R light about 36 in above and about 60%. Ph is 6, gh flora series 3 part nutes With cal-mag as well. I have a small fan that runs 24/7.
 

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Hook Daddy said:
Any idea what is causing the leaves to curl a bit on the edges? They are sour diesel growing in coco and perlite with a recirculating drip system, hlg 600R light about 36 in above and about 60%. Ph is 6, gh flora series 3 part nutes With cal-mag as well. I have a small fan that runs 24/7.
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I see what may be Nitrogen claw. How are you dosing the GH nutes and calmag? Are you using tap water? Are you measuring ppm/EC?
 
I’m using our well water, it’s seemed ok in other grows. Last batch of nutes was 25 ml each of the 3 part gh and 10 ml Cali magic in 5 gallons water. Ppm is 732. Ph is just under 6.
 
The ppm of our well water is 185. I guess I don’t know what’s in it, we did have an analysis that was done, I’ll try and find it.
 
Heat stress is one thing I was considering. The room gets about 90 during hot days. I already put an ac unit in there to see if it helps.
 
Hook Daddy said:
Any idea what is causing the leaves to curl a bit on the edges? They are sour diesel growing in coco and perlite with a recirculating drip system, hlg 600R light about 36 in above and about 60%. Ph is 6, gh flora series 3 part nutes With cal-mag as well. I have a small fan that runs 24/7.
Click to expand...

OP this is positively boron deficiency. The most common reason for boron lockout is an alkaline soil condition. If you are ph'ing to 6, and they get a micro-nutrient solution, I don't know why it would be happening. The boiled potato chip look is unmistakable.

I would switch brands or diversify the hydro products.

I had this in soil outdoors this very spring, and the cause was ph. Too much dolomite.

I've got photos before and ~3 weeks later but all I did was correct ph.

IMG_20210521_124531.jpg
IMG_20210517_125112.jpg
IMG_20210615_173657.jpg
 
Humble_Budlings said:
OP this is positively boron deficiency. The most common reason for boron lockout is an alkaline soil condition. If you are ph'ing to 6, and they get a micro-nutrient solution, I don't know why it would be happening. The boiled potato chip look is unmistakable.

I would switch brands or diversify the hydro products.

I had this in soil outdoors this very spring, and the cause was ph. Too much dolomite.

I've got photos before and ~3 weeks later but all I did was correct ph.

View attachment 4927551
View attachment 4927566
View attachment 4927553
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Yup, just had this happen to some small plants in preveg, high pH and too close to the light, came here to confirm my suspicions.
 
The plants haven’t changed much in appearance, perhaps getting better. Making sure to keep the ph down. I’m using about 40ml of white vinegar per day to lower the ph in my 17 gallon res, about 12 gallons in the res on a normal day, is this normal? I also see the ppm slowly going down, so I’m going to start putting in a higher ppm 1 gal mix with a low ph once a day, then change the res once a week, is this a good schedule/plan?
 
Hook Daddy said:
The plants haven’t changed much in appearance, perhaps getting better. Making sure to keep the ph down. I’m using about 40ml of white vinegar per day to lower the ph in my 17 gallon res, about 12 gallons in the res on a normal day, is this normal? I also see the ppm slowly going down, so I’m going to start putting in a higher ppm 1 gal mix with a low ph once a day, then change the res once a week, is this a good schedule/plan?
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Damaged leaves will stay that way, just make sure new growth looks good.
 
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