Check the winners The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Log In
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
English
Log In
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Wrinkly and twisting leaves with ?cal? Def?
growpro44
started grow question 2y ago
Could this be too less air circulation and too hot temps? It seems i have it everytime i put them in flower and put on the big spiderfarmer 730 watt
Solved
Leaves. Curl up
likes
Inganjawetrust
answered grow question 2y ago
Looks like heat stress ,if your light has a dimmer try turning it down some. If no dimmer then raise the light if possible.
1 like
Complain
Selected By The Grower
Scrubbyjimbob
answered grow question 2y ago
I would say your instincts are leading you in the right direction.
1 like
Complain
Similar Grow Questions
Solved
THe_Cannadaddy
Browning / curling of leaves late flower. 3/4 clones affected - all different strains. Refer to week 14 flower post
Browning / curling (up and down) of edges of leaves started 05/21/21 on the orange cookies Since then the OGK and TT have also gotten brown leaves, the Gelato is unbothered Could this be nutes? part of the flush process? I have also read it could be old age? a natural thing? halp
Week 14
Leaves. Edges burnt
Leaves. Curl up
Leaves. Curl down
5y ago
2
Solved
Tontsekz
Started LST but now plants look a bit sick?
I attempted to do LST but I think I've maybe started too early as some of the leafs started to wilt kinda bad afterwards. Was careful not to break anything. Edges are curling and have discolored. I have a feeling they're a bit short too? Photo from 5 days ago and today.
Week 2
Leaves. Curl up
Leaves. Color - Mottling
Plant. Too short
6y ago
3
2
Solved
Fordsie
Phosphorus def in veg?
Phosphorus deficiency in wk 4 of veg? I noticed a few small discolored blotches on lower leaves 2 days ago and today it is a lot worse! Use flora trio, and 2 other plants in this run are under same conditions with same nutes. Could this be a pH issue? PH has been consistently ~6.
Leaves. Curl up
Leaves. Twisted
Leaves. Color - Dark-brown
5y ago
1
2
Solved
ValleoGrow
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
Week 2
Leaves. Curl up
8y ago
1
Solved
Ishkabud
Yellowing cause?
What could this yellow and brown spotting be on the uppermost leaves? Also the curling? They are autos, i am giving them half dose of bloom and phospherous nutrients, as well as half dose cal-mag, temperature isnt overly high, watering every 2-3days until runoff.. bit confused
Leaves. Curl up
Leaves. Color - Mottling
2y ago
1
1
Solved
Cannabar
Curling/hook shaped leaves.
Does anybody know what's going on with these leaves that are folding inwards and curling into a hook shape! Any solutions?
Week 10
Leaves. Curl up
6y ago
1
3
Solved
IrishGrows
Outward Edge Curl
Noticing an inward curl to the outward edge of leaves. Happened before any nutrients. Temperatures for the tent have bit 78-94 with some times sticking in the low 90s for hours. Have been able to keep the tent in low 80s the last few days. Anyone else have a suggestion?
Week 1
Leaves. Curl up
6y ago
1
1
Solved
MasterOfNone
Does anyone know what this is? Just before this happened the leafs were cupping upward. She’s in coco coir and perlite. I feed her biobizz grow 3ml/l and biobizz heaven 4ml/l and cal mag 1ml/l and ph the water to 6.3 about 6-7 weeks into veg and this is the first problem I’ve had
Leaves. Tips - Burnt
Leaves. Curl up
Leaves. Color - Yellow
6y ago
1
4
Solved
Rockminer
Can’t figure this one out
What is going on with this one? The rest are fine.
Leaves. Curl up
6y ago
1
5
Solved
ccore
I am having issues late in flower. Curling leaves at the top and some brown spots. Please see photos marked #1 and #2. Last week I let her dry out too much (coco), so runoff EC eas very high. Have been keeping runoff below 1.1EC
Week 10
Leaves. Tips - Burnt
Leaves. Curl up
6y ago
1
4
Solved
Dreamchvser
End of Flower, Yellow and crusty leaves ok ?
Hey last weeks of flower and I’m not sure if it’s fine how they are developing, as I started flushing this week they quickly started developing yellow crusty leaves. Should I keep flushing them as I will cut them in 1 or 2 weeks or should I try to balance out missing nutrients?
Leaves. Curl up
Leaves. Curl down
Leaves. Color - Yellow
2y ago
4
2
Solved
NeptunesTerps
Weird Curls and Holes
Okaaayyy so wtf 😂 I've altered light intensity and height multiple times at this point. I've ruled out pests. I think it's either windburn, heat, light, or a combination of all 3. It's a little concerning seeing as how I think mid flower is right around the corner 😓
Leaves. Curl up
1y ago
4
3
Solved
Ethereal
Tips of leaves turning
The tips of leaves are turning up a bit. I guess they are doing that because of high temperature, but could there be any other reason they are doing this?
Week 2
Leaves. Curl up
5y ago
2
3
Solved
TheNextGanjaMan
Yellow leaves near the harvest
This would be my last week of fertilizer watering. And the plant has the leaves turned to the side and with yellow spots. Sign of lack of zinc? I would start making the flush from Friday, is it recommended to start now? In about 2 weeks I will harvest (I tried to water today)
Leaves. Curl up
Leaves. Color - Yellow
Feeding. Deficiences
4y ago
2
6
Solved
SierraKilo1313
What are the leaves indicating ? I'm a little confused whether light or nutes?
Week 5
Leaves. Curl up
5mo ago
4
6
Solved
BnV405
Leaves curled up?
Leaves curling up? Not all.. a few we have moved the light up and I brought the plant down some. It started earlier and the light fixes it but now we are doing it again... no discoloration or wilting..
Leaves. Curl up
5y ago
2
3
Solved
SupremeStoner
So on the biggest dawg plant. The leaves are a super rich green. But ive noticed this week the points of the leaves are slowly curling and pointing up on a 60% angle. Apart from that the cola is the biggest of all 5 plants super dense and fat, with a huge mid plant growth
Week 8
Leaves. Curl up
7y ago
2
3
Solved
gogocrack
Over watering?
Dude, what's the problem with this girl? The transplant was done 1 week ago because the pot was small. But since then the leaves have always seemed curled and dry. Could it be above water? The top and edges of the pot are dry but around the root ball is moist.
Leaves. Curl up
5y ago
3
3
Solved
ZeroKnown
wrinkled leaves after starting 3rd week
Hi guys, since may 29th im in 3rd week, and started noticing some strange wrinkled leaf, searching on internet it could be lack of potassium, what do you suggest?
Week 3
Leaves. Curl up
Leaves. Other
6y ago
3
Solved
Speedypete
Leaves yellowing and curling
Leaves seem to be yellowing and curling upwards. Is this under watering or a deeper issue such as nitrogen deficiency?
Week 3
Leaves. Curl up
Leaves. Color - Yellow
5y ago
1
3