Vote Now 🏆 for the Grow Awards 2025!

Chat

By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms

Accept

Recommended

Grow QuestionsHelp! My leaves show some bad sign i think, is that a sign of heat stress??

Help! My leaves show some bad sign i think, is that a sign of heat stress??

Natural_Medicinestarted grow question 5 years ago

Help! Is this a sign of heat stress my leaves edges is kink a little like the picture below If yes what should i do, i run marshydro ts1000 at 75% of power and 50cm lamp to plant distance (Now it’s 20 days old)

Natural_Medicine

Natural_Medicine

Open

Leaves. Curl up

likes

Answer

Rap_a_capanswered grow question 5 years ago

Hi, this is an initial heat stress, the edges start to curl up trying to dissipate more water. Little corrections (watering & humidity) are needed. Cheers

1 like

Complain

Fusionanswered grow question 5 years ago

Ran into this with my balcony grows. Happened over a day or two. It's a root issue. Not sure if it's the peatsoil too compacted choking out the roots or over watering or pests. But I transplanted mine into better soil and fixed the problem.

1 like

Complain

Fruitgroweranswered grow question 5 years ago

Increase humidity, the leaves need moisture around 65/75% rh is perfect! 👍🌱

1 like

Complain

Similar Grow Questions

Solved

Pluto Auto from Ethos leafs yellowing from bottom up? Help??With yellowing climbing up from bottom to top mixed with brown spots and new smaller growth looks stunned about 5 days after giving a lil nutrients what would your opinion be on what’s going on here? Any advice helps, and thank you in advance. Pluto Auto week 6 day 2

Leaves. Curl up

Leaves. Color - Yellow

Leaves. Other

4 years ago

1

1

Solved

since this week the lower leafs from my plant started changing color. they also began to get brown spots en curl up. anyone know what this could be an what i can do about it?

Leaves. Curl up

Leaves. Color - Yellow

4 years ago

2

4

Solved

Please Help! Seedlings are cupping and twisting!All my seedings, that are different strains, are tacoing and twisting!! Im starting my seedlings indoors under HLG 65 at 18 in. 78 degrees, 50% RH. I do not understand why they are all doing this (except my white widow) Do i need to move my light further away?

Leaves. Curl up

Leaves. Twisted

Setup. Lighting

4 years ago

3

6

Solved

Is this Ph lockout Coco drip setup with the full canna line except boost. Week 7 juicy fruits auto. Feeding at 1.5EC and ph 5.8 to 6.2. I drip for 26 seconds about every 2 hours pump stops as soon as there is run off. Run off was at 5.25 Ph and 1.5 EC. I flushed with ro water with nutes 1.0 5.8.

Leaves. Edges burnt

Leaves. Tips - Burnt

Leaves. Curl up

4 years ago

2

Solved

Nutrient problem??? Excess or deficiency?What do you think is the leaf issue? Open to second opinions. Most everything stayed the same, except: > increased water: 2L to 3L per 7 gal of soil > introduced a bloom booster > increased volume of worm castings, molasses, mycrobes and ethylene to the tea

Leaves. Edges burnt

Leaves. Curl up

4 years ago

5

Solved

Leaves curl on upper new growth and mid but not lower.I’m using the canna coco line except boost, looks like phosphorus deficiency. I just lowered my a and b 0.7 ec and added 0.3 of pk for a total of 1.0. Is this phosphorus deficiency and do you think my changes will help. Leaves are a little dark shinny and the shape is odd.

Leaves. Curl up

Leaves. Curl down

4 years ago

1

Solved

Sign of overwatering?Houston,going down. First pair of leaves already starting to curl up. Runoff ppm is on 200. should be over watering?

Leaves. Curl up

4 years ago

3

3

Solved

Leafs curled up Hi there, I need some advice. It’s day 29 an the leafs curled up. What could it be ? I didn’t water for 48 hours, light ist 60 cm away, temperature is 28C I started to give 1,5 ml of bio grow. Thanks in advance

Leaves. Curl up

4 years ago

3

6

Solved

What does my plant need and what do i do wrong?I need help, I can not exactly see what my problem is with my plants, I used the first time 70% coco and 30% perlite. I am just in the 4th week and fertilize my plants with: -Canna Coco A & B 1ml/l, Bio-Heaven 1ml/l, Bio-Bloom 1ml/l, Top-Max 0,8ml/l. What do my plants need?

Leaves. Tips - Burnt

Leaves. Curl up

Leaves. Color - Yellow

4 years ago

3

4

Solved

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?

Leaves. Curl up

4 years ago

2

3

Solved

Cotyledons curling upwards - the others didn't do this? :(I'm not sure what's going on! The two others didn't do this. I'm using ViparSpectra XS2000 at 24" distance and 50% intensity.

Leaves. Curl up

Setup. Seedling

4 years ago

1

Solved

Brown spots and yellowing leaves.I’ve just started to get these brown spots and yellowing leaves on the top leaves of one plant. Not sure what it is, potassium or calcium deficiency. Soil ph is 6.35. Water with regular nutrients at a ph of 6.5.

Leaves. Curl up

Leaves. Color - Mottling

4 years ago

1

1

Solved

angebaut_und_zugeschaut

Leafs crawling / canoe form / pointing upward /Hello dear GD-Community, i'm a little bit concerned about the deformed leafs and my mistake to feed to much nutes at 02.06.2021. Since then i'd watered only with mineral water and a small amount of canna bio rhizotonic. Claws are point up and formed like canoes. pH 6.4

Leaves. Curl up

4 years ago

1

3

Solved

Jaygrow1020_autoking

Spots and leaf's are curly up Can any one tell me what is this problem? And how do I fix it...

Leaves. Edges burnt

Leaves. Curl up

4 years ago

2

2

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

4 years ago

1

Solved

Help the leaf my CBD auto fix is starting to curl and shows a shiny matter on the leaf. she gets 2 ml of voodoo juice daily, and 0.5 ml of x-cell / 1 l = 400 ml. ph is 6.8.. does anyone know what this is and what I should do?

Leaves. Curl up

4 years ago

1

4

Solved

SirSmokeALot333

Help what's this Westcoast O.G day 64 watered her today with Calmag + Bigfruits greenbuzz liquids. Coming after work seeing this. Last feeding was on week 8 with some bat guano. Run off is 6.3 growing in allmix biobizz soil.

Leaves. Curl up

Leaves. Color - Dark-brown

4 years ago

4

4

Solved

Deficiency?Hi, I've encountered some deficiencies in my plant but I'm not sure whether it's Magnesium, Potassium or anything else. I'm using the BioBizz outdoor trypack (BioBloom+FishMix+TopMax) Currently 2ml/L each. Symptoms are shown in the lower leaves. Maybe CalMag? or Pk 13-14? pls lmk

Leaves. Edges burnt

Leaves. Curl up

Leaves. Color - Yellow

4 years ago

2

2

Solved

tips leaves Hi, some leaves have started spinning the tips of the leaves up and down, what could it be? Thank you

Leaves. Curl up

Leaves. Curl down

4 years ago

2

2

Solved

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.

Leaves. Edges burnt

Leaves. Curl up

Leaves. Color - Dark-brown

4 years ago

2

3