The Grow Awards 2026 🏆

Back to Grow Questions

Upward curl

GrischaBXLstarted grow question 4y ago

Hi Breeders, Elizabeth is growing well, but the bigger leaves are curling up at the edges. I already increased lamp hight and lowered to 18/6. Is it air humidity? Or too much water?

GrischaBXL

GrischaBXL

Solved

Leaves. Curl up

likes

Hempy_The_Kidanswered grow question 4y ago

When leaves curl (taco) it's usually a sign of heat/light stress.

1 like

Complain

Selected By The Grower

Similar Grow Questions

Solved

Yellowing between veins on 3 of 4 plants, and curled tips - 27-29C in tent - Just heat/light stress or something more?Only on 3 out of 4 of my girls, see 1 pic of sad girl and 1 pic of happy girl. Does it look like heat/light stress to you or something more? I was running my LED 45 cm below the lights dimmed to provide 20-30k lux at plant level. Just now raised to 65cm, lux 20k.

Leaves. Curl up

Leaves. Veins - yellow between

4y ago

1

Solved

Hi all, I have had very slightly yellow tips on this plant for a while. She is mid week week 10. Two days ago the leaves started to curl and the yellow has spread slightly. Last night I flushed her with PH water and have dimmed the light slightly, anything else I can do 🤙thanks

Leaves. Curl up

Leaves. Color - Yellow

4y ago

4

5

Solved

Hojas en formas de canoa Tengo hojas en formas de canoa en la 3ra semana, solo las hojas bajas, no estoy fertlizando aún. Tengo luz led asi que no es calor. Sospecho algo relacionado con la humedad o el ph. Alguna experiencia?

Leaves. Curl up

6y ago

1

4

Solved

Heat or something else? Cont.Still on the heat issue (apologies I clicked resolved and it wasn't) got the tent door open most of the day, as mentioned have 2 additional usb style oscillating fans on route to aim at the lights and help flow in the canopy, not sure AC unit an option. Should I raise lights?

Leaves. Curl up

5y ago

2

3

Solved

Leaves curling up and Tips drying out (Day38)Not sure whats going on? Heat stress, Thrip related, too little nutes or water? Noticed a slight curling yesterday and guessed on thirst since watering was delayed and then gave just half dose. Also heatwave going on right now. Nutes are at very low levels..

Leaves. Curl up

5y ago

1

3

Solved

Bottom leaves Bottom leaves yellowish, and doing a weird curve close to the tips, just the first set of leaves tho. What is it?

Leaves. Curl up

Leaves. Twisted

Leaves. Color - Yellow

6y ago

4

1

Solved

Gelbe Spitze Habe Probleme hauptsächlich an der Spitze und vereinzelt an der Pflanze! An der Spitze ist es nur am auffälligsten.. Kann es Lichtbrand sein?

Leaves. Curl up

Leaves. Color - Yellow

1y ago

1

1

Solved

Yellow leaves Hello, take a look at the pictures please. Leaves are turning yellow and curl. Is this a N burn, or a deficianty from some mineral? Or is this nutrient lockout? Plant does grow well!

Leaves. Curl up

Leaves. Color - Yellow

6y ago

3

3

Solved

Overwater, Normal, Circadian Rhythm or Underwater?Water-stress drooping symptoms on 2 younger colas. Mature colas leaves are praying / perkier. Some leaves 'canoe-ing' despite temps around 70-74F. Soil is still moist from 1L water 25 hours ago (6.3PH). Will water in 8 hours, making 33 hour interval. Normal or Water Stress?

Leaves. Curl up

Leaves. Curl down

2y ago

7

7

Solved

Growing_Spartan

Anyone know what this is?Hey so I have this auto flowering at the moment and I came back after a few days to see the buds are getting yellow tips and are pointing upwards, not quite sure what type of deficiency I’m dealing with but if you know would you kindly direct me in the right direction to fix it?

Leaves. Curl up

Leaves. Color - Yellow

1y ago

1

3

Solved

Leaves curling up after changing from HPS to MH I've had a question answered regarding leaf drooping due to overwatering/adding feed too early but now I've changed my bulb to a 600w MH the leaves are curling upwards. I've turned it down to 250w for now it's currently at 45cm above canopy level.Any ideas? Thank you ☮️

Leaves. Curl up

3y ago

1

1

Solved

Praying leaves The leaves are stretching up (praying leaves as I understand). It's just 1 day after topping and I would expect some stress, is this a good or bad sign? I fear I might have topped them a bit too early.

Leaves. Curl up

Techniques. Topping

5y ago

23

3

Solved

Weird form on 11 day old seedlings Hi, The leaves of my 11 days old are a little but curly, I suspect it is related to to much light, Did anyone experienced the same issue?

Leaves. Curl up

5y ago

2

3

Solved

Claws and praying hands leaves This plant has not looked good. I did some defoliating and lst. The leaves have always looked like claws, top leaves like praying hands.

Leaves. Curl up

Leaves. Curl down

5y ago

1

3

Solved

Captain_marijuana

Tip curl Slight curl at tips of some leaves?

Leaves. Curl up

3y ago

5

5

Solved

Yellow spots and purple stems I have these yellow spots on my fan leaves and purple stems on just one of my Girl Scout Cookies. Both being fed the same thing, temps are stable and so is humidity. Don't understand what's up with this girl. 1st 4 pics of issue plant last is of her healthy sister.

Leaves. Curl up

Leaves. Veins - yellow between

Plant. Stem - Red or purple

4y ago

5

2

Solved

Yellow and fragile leaves 2 week Couple leaves yellowing and bit curved up. I suggest there can be the options: 1) magnesium deficiency; 2) nitrogen deficiency; 3) Light burn. For case it is magnesium deficiency I sprayed the leaves with magnesium sulfate (solution - 1g per 1 liter), but it won't help.

Leaves. Edges burnt

Leaves. Curl up

Leaves. Color - Yellow

3y ago

1

Solved

Brown spot/ dry spot I have a brown spot at the tip of my 2 week old plant. Please help!

Leaves. Curl up

Leaves. Color - Yellow

5y ago

1

1

Solved

Why are the sides curling up?Why are the leaves curling up? Temp doesn't get over 25 degrees at day and is around 12 at night. at some of the tips are slightly brown spots. Is happening in both of my plants but 1 doesn't have the brown ends

Leaves. Curl up

5y ago

1

2

Solved

Heat, RH or overwatering? Or alltogether?Hey my fellow growers! The grow reached 32Celsius the last 2 days in the last hour before going into night time. On that time RH goes down to 32% and this seems like it's stressing this lady a bit. Yesterday fed her nuts - maybe a bit too much? Thank you for stopping by!

Leaves. Curl up

Setup. Lighting

Feeding. Deficiences

6y ago

2

2