The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Login
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
Login
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Curling dark leaves
Bretwalda
started grow question 4y ago
Advice for what i think is nitrogen deficiency, have flushed with ph 6.3-6.4 water about 900ml
Solved
Leaves. Curl up
likes
Hazemaster420
answered grow question 4y ago
She’s fine, let her dry out a bit! Also add some Magnesium sulphate to straighten her out! Cal mag her up! Mainly Magnesium though!
1 like
Complain
Selected By The Grower
GrowersParadise
answered grow question 4y ago
to me looks like plenty of Nitrogen, possibly over watering? how often are you watering?
1 like
Complain
Bretwalda
answered grow question 4y ago
@hazemaster420
, is cal mag and magnesium sulphate same thing or give both?
likes
Complain
Roberts
answered grow question 4y ago
Nitrogen toxicity is issue
2 likes
Complain
Hazemaster420
answered grow question 4y ago
Theirs plenty of nitrogen though, see how the leaves are slightly turning? This is a sign of too much Nitrates/nitrogen!
1 like
Complain
Similar Grow Questions
Solved
sndwich
Heat or something else?
Assuming the curling leaves from heat? it's Effecting everyone EXCEPT the American Pie which has been perfect from day one which quick growth on her. Plan is to get more fans to help more the air around , any thoughts etc would be great D
Week 4
Leaves. Curl up
5y ago
2
2
Solved
fathermichael
Sudden Leaf Yellowing – Lighting Issue or Something Else?
Hello! Yesterday, I noticed the top leaves turning slightly yellow, but today it looks dramatic. Check the pictures—leaves are yellowing and drying out rapidly. It’s only affecting the central leaves, so I suspect a lighting issue, but I’d like to confirm before taking action.
Leaves. Curl up
Leaves. Color - Yellow
9mo ago
3
Solved
TCH0808
PPFD Management -- Am I doing this right? :) (See fan leaf photos for curling)
TS1000 (150W x 2), set to 75% at 12-14". "Photone" app (yes, not as good as a PAR reader) reads 580-700 PPFD, so I sense these girls aren't getting as much light as they could. I've read that pushing 900 PPFD is desired (CO2 bags);fan leaves curled. How should I think about this?
Week 3
Leaves. Curl up
4y ago
1
7
Solved
BudChronicles
Leaf tips curling on top
What’s causing the leaf tips to curl? I moved the light away and reduced the power to 75%. Please advise on how I can address this. Looks like her growth has changed, a bit slower and a bit lengthy.
Week 11
Leaves. Curl up
3y ago
4
3
Solved
HiddenMessage
What is causing this, need water? too hot? ...?
Week 16
Leaves. Curl up
5y ago
1
Solved
UpInSmoke420
Heat stress?
What's the best temperature for autoflowers? Or I've been running mine at around 28/29c and I think she may be abit heat stressed?
Leaves. Curl up
6y ago
1
5
Solved
kaiabel
Leaves are looking a bit strange.
Leaves looking sick hope its not root rot, i changed the light but only from 25% q5 to 50% evo 3 maybe it was a bit too close. I tried closer to prevent them from growing more in hight.
Week 11
Leaves. Curl up
4y ago
6
2
Solved
Calzini1
Curled up leaves on day 7
I started a plant ten days ago and from the 7th day some leaves started curling upwards. I flushed the soil one day before planting the sprout and watered it again on day 9. I use the Fecida 600 lamp 16/8 day/night. Does someone know what could cause the curling of the leaves?
Leaves. Curl up
1y ago
1
Solved
SneakyDog
Is she poorly ?
Top set of new growth part is a little crispy and curling taco style. Is this down to heat ? Growing in greenhouse in U.K. other plants are okay and I do have a second plant in the same pot that’s perfectly okay ?
Leaves. Curl up
Leaves. Curl down
4y ago
1
2
Solved
NewJackWeed
Mars Hydro dim settings
@weezy90 I have it dimmed to about 35% at 19”. I may be paranoid but I think I see slight tacoing! Should I crank to 90%? 100%?
Week 3
Leaves. Curl up
Setup. Lighting
5y ago
3
4
Solved
Rhaegar138
Leaves curled
Why are these leaves doing this? I don't have a lot of info as it's a mates. Pink kush transplanted into soil is a greenhouse.
Leaves. Curl up
4y ago
9
6
Solved
Cryptovirus
Sign of overwatering?
Houston,going down. First pair of leaves already starting to curl up. Runoff ppm is on 200. should be over watering?
Week 2
Leaves. Curl up
4y ago
3
3
Solved
rahzellonce
Leaf curl up
Hy my fiends! Sorry for my english!! I have 4 weeks old norden auto PH 6.5, plagron terra grow 5ml / L a few days ago LST (leaf stains and curly) idea? thanks
Leaves. Curl up
5y ago
3
3
Solved
ze1yk
curled leaves
please why are the leaves twisted like that? PH 6- 6,5, light 50cm over plants,18/6 THX
Leaves. Curl up
3y ago
4
2
Solved
OrganicRepresent
Yellowing leaves
Hi there i have issue with one of my girls and start similar issue with other not sure of what defiecity is it? Or underwatering? New leaves seem to have it as well. What issue can this be ? Can You help me please. Thanks.
Week 4
Leaves. Curl up
Leaves. Curl down
Leaves. Color - Yellow
5y ago
6
6
Solved
MrGreen92
Asymmetrical baby seedling
Hi everyone, just need an opinion on my poor seedling that looks a bit mutated and stressed, came home today and my timer decided to break and just stay on no matter what you press.. My heater comes on when the lights off and was 28c in there 🙄 should I move the light away?
Leaves. Curl up
Leaves. Twisted
Setup. Lighting
4y ago
5
6
Solved
Smokin_Joe
Guess on what this is?
Unsure what this issue might be. PH seems in check going in and out. Getting mainly Fox Farms nutrients - got very weak doses of B-52 and CalMag a week or two ago. The other two plants are fine.
Week 6
Leaves. Edges burnt
Leaves. Curl up
Leaves. Color - Dark-brown
4y ago
2
3
Solved
Slaccio
1st Grow Problems (can’t solve)
Okay brothers. I’m having problems with my autos. They are Assorted from Budha, 2nd week as plants. They both look stressed or sick. I’m not sure. One looks shiny and with light stress and the other haves other sympthoms. I’m using HPS 250 and All Mix from BioBizz, no nuts.
Leaves. Curl up
Leaves. Curl down
Leaves. Color - Pale
5y ago
1
Solved
TyrannusTyrannus
Fan leaves curling up
Some of the fan leaves are curling up at the tips. Not all of the leaves just a few and only at the longest petal. Is this something I should be concerned about?
Week 6
Leaves. Curl up
5y ago
1
Solved
K8T80
Discoloured leaves
Some of the leaves on my plant are kind of golden in the middle.. not sure what this means
Week 10
Leaves. Curl up
Leaves. Veins - yellow between
5y ago
1
1