The Grow Awards 2026 🏆 
Leaves curling upward, is this due to to High humi...
ValleoGrowstarted grow question 8y ago
Leaves curling upward, is this due to to High humidity or What? The humidity is 80% and i know its to much its cause its been raining alot lately and my tent is outside In a open shaq
likes
DudeGrowsWeedanswered grow question 8y ago
Leaf tips curling up are an indication of LED burn. I’d suggest trying to raise your LED lights.
Similar Grow Questions
Solved
weedfan133
The leaves have become glossy and yellowThe last couple of days, the leaves have lifted a bit again and bent the edges, and the leaves are glossy, was it a mistake to keep the light on 24h the first week, or what do the last couple of pics look like? (I have now set the mode to 18/6) so as not to fry the plant10mo ago
5
6
Solved
dataTwiiix
Brown area on leavesBonjours à tous. Voilà certaines feuilles de ma plante deviennent attrape des tâches brunes. J'ai donné du GHE essential (oligo-éléments) and cal magnifique (0,3ml/L) ce matin ainsi que du biographie Bloom. Je pense à une carence en magnésium et vous qu'en pensez-vous?5y ago
4
2
Solved
OrganicAutomatic
Tips curling upI noticed the tips beginning to curl up.
I did gave her bio grow in the last two weeks 0.5ml/lt ph 6.5 almost every watering i used bio grow.
I have another 8 plants of different breeds and none of them showing anything wrong.
I wander if its the nutrients or perhaps the light?Week 6
Leaves. Curl up
3y ago
3
2
Solved
Tiagorchaves
Day 7 over fert?Since i added the rest of the ferts to the mix and the root touched the wateron day 5 the leafs started to claw it looks overfert. Not having and tds meter gets diffiult to manage the ppm on the solution. Should i renew the water on the reservoir?Leaves. Curl up
5y ago
1
1
Solved
KUSH01
Leaves curling is it due to light stress or wind over canopy? Have provided pictures of leaves labelled "leaves curling" and also lamp to plant distance. Lamp to plant distance is 1.5 to 2ft.All leaves affected are the ones closest to light .Any advice greatly appreciated.Week 6
Leaves. Curl up
6y ago
1
Solved
AZMamaBear
Curling leaves - heat stress?Some of the leaves are curling. Sits next to another indica that doesn’t seem to be affected. Temps here in Arizona have been 100-110 for weeks. I presume this is heat stress but would 💗 2nd opinion. She’s in the most protected area of the garden, so probably can’t fix this.Week 23
Leaves. Curl up
4y ago
1
4
Solved
Anorak
Tips burning, plants dying, very fast progressionGreetings growers! Plants are dying, every grow it starts in the 3rd week of flowering. Using Green House Feeding Organic, PH is up to the point,100% sure. Soil - light mix,vermiculite, perlite. Top leafs are burnt, bottom leafs are turning yellow and falling off.Leaves. Edges burnt
Leaves. Tips - Die
Leaves. Curl up
4y ago
2
2
Solved
floridaboy
CuppingOn the right plant in diary pic it shows slight upward cupping on the edges of a few leaves. There are a couple of others on the other side. But 95% of the leaves are fine. During my first try at LST I broke the main stem by 70%. I think this caused the cupping?Week 4
Leaves. Curl up
2y ago
6
2
Solved
willisknows
Heat stress?Does this look like heat stress? It’s been in the 90’s all week.Leaves. Curl up
5y ago
2
2
Solved
Kraze
Leaf tips turning yellowish brownishHi all, I have a issue with my plant, I recently changed from soil to Coco and now I am 1 months in and my plants has all its tips brownish yellow, I suspected it was overwatering or Potassium deficiency but I Am not sure about it, anyone has an idea? ThanksLeaves. Curl up
Leaves. Color - Yellow
Leaves. Color - Pale
3y ago
1
1
Solved
Kaya666
Any idea why my top leaves would be taco'ing at the edges? I keep my room about 72-73 degrees and am just using one CFL bulb (45w) that I keep at least 6 inches above the plant. And I keep a gentle fan or two on her most of the time to keep the air moving. Thanks.Week 4
Leaves. Curl up
6mo ago
2
4
Solved
Gleneagle_87
Leaves turning pale/crispy hours after watering/feeding!Hello all,
Leaves turning pale hours after watering and feeding. Water is Volvic ph’d to 6.5 ppm 500 is 120, Ec 0.2. Put 0.05ml ph down for 4.5l. Dosnt seem as bad with Calmag at 1/4 dose. With feed connoisseur an n additives ph 6.1/6.5 ppm ~450 ec 0.8. Started 1w back.
Thank youLeaves. Curl up
Leaves. Dropping off
Leaves. Color - Pale
10mo ago
3
3
Solved
Bretwalda
Curling dark leavesAdvice for what i think is nitrogen deficiency, have flushed with ph 6.3-6.4 water about 900mlLeaves. Curl up
4y ago
5
5
Solved
Chaweeder
What's the optimal temp In a grow roomHey I was hoping to find the best temperature in my grow room. The range that I have in my room is between 22-29, with humidity between 38-52 %. I think there is a bit of heat stress on a few of them.i dont believe its overwatering I let her dry out pretty goodLeaves. Curl up
6y ago
2
3
Solved
Newfie80
Leaves curling upSo I have flushed my remaining widows with 20 gallons of ph water 6.5 to take ppm down to 250 ppm runoff, they have two weeks left till harvest, the fan leaves have started to fold into themselves, I don’t know what is happening, they are in smart pots too.Week 10
Leaves. Curl up
5y ago
2
2
Solved
PAPH_Grow
browning leavesAnybody have any idea on the cause of my leaves getting brown spots and curling at the tips? It's really just on the big mature leaves and leaves near the buds. Any smaller and younger leaves are still fine. Maybe a nutrient issue? Or is it just that its close to harvest time?5y ago
1
Solved
GR0WER
Leaves tips curls upSo, it is my problem. Few leaves on the top of the central plant. Idk, what kind of pathology is it and how to kure it.
I guessing overheat, but temperature sensor shows 25°c max, lamp to plant distance is about 30cm.
Also, they aren't smelly no more.
Please, helpLeaves. Curl up
3y ago
2
1
