Vote Now 🏆 for the Grow Awards 2025!
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
Dark green leaves and curling tips
Raysoseriousstarted grow question 4 years ago
I’ve noticed some of my leaves tips curling and seem a little darker than they should . Some tops on the top are showing like they’re gonna turn yellow . I was thinking it may be some form of heat stress or wind stress . So I’ve corrected . Any ideas of what it may be ?
likes
Answer
Ezzjaybruhanswered grow question 4 years ago
Textbook N excess what you are describing
1 like
Complain
Herbz_Unkrautanswered grow question 4 years ago
N tox
Dark glossy green
Tips curl down
Typically NTox
1 like
Complain
ChitownCannaChicaanswered grow question 4 years ago
Not heat or wind—- straight up nitrogen toxicity—- just give her some straight water for a bit. You see the problems two weeks later—so this has been going on for a bit. Good luck ✌️🏻💚🌿💨
2 likes
Complain
Aqueminianswered grow question 4 years ago
Dark green leaves that look shiny and claw down = Nitrogen Toxicity.
Start giving it plain pH adjusted water. It will be fine, a lot of smaller plants can do this is soil/coco grows when there young.
1 like
Complain
Similar Grow Questions
Solved
TechDCo
1. Over Fed (seaweed?)
2. Burnt? Cauliflower..
3. Calcium Deficiency
4. Hydrogen peroxide 12% Food-grade 30/70 Mix.
Personally I think it's the hydrogen peroxide 12% mix, the hydrogen gave one of its atoms to the neuron of the Diatomaceous earth metal clay. With help from heata year ago
8
8
Solved
Caleb1305
Curling and not sure why!?I have some curling with the leaves, yesterday was the first day the plants were light to the touch and curling down on day 2 instead of 3 I water normally every three days but went a day earlier because of the drooping and light pots, but there still drooping some today?any ideaLeaves. Curl down
a year ago
2
2
Solved
einamio
Hello weed doctors, I need help identifying the problem and gathering advice how to enhance my second grow. It's only day 29 and my girls are sick, whI'm in biobizz lightmix. Started biogrow on D24, the dose was 50% in 400ml water. Until D24 only rootjuice. Yesterday gave 1400ml each, with 100% biogrow, pH6.4 EC 1.1. My water is hard pH7.7 EC0.8, so I wasn't adding calmag yet. There was 400ml runoff EC 1.9 - why? What do I do?a year ago
9
7
Solved
CeeJayy420
Do I have an (Mg) issue?Leaves turn light, have black spots and 1 leaf rolls in upwards. It got Epsomite with every watering so I guess it's not a deficiency. Last time there was not even a drain. So maybe nutrient absorption is blocked? Should I flush? Is it to stressfull for this autoflower?a year ago
3
6
Solved
TheNextGanjaMan
Pest attack. What can I use to eradicate?3 weeks of flowering, and the pests are still here. Can I play Beauveria Bassiana? Or just neem oil?
- The temperatures were very high here, exceeding 30°C, this week it will decrease.
- I have other plants to harvest and I'm going to take advantage and clean the grow.
Help 😥a year ago
4
4
Solved
brownbae420
S.O.S Droopy leaves on AutosJust watered these three plants yesterday. I had a weird feeling my ph Meter was not calibrated. I keep a secondary unhand to double test, but its batteries are dead. Could this be low PH? Other than that, Is it the intensity of the light I recently changed it to 100%.a year ago
5
5
Solved
DWCDream
Overwatering/heat/nutrient problemLeaf edges curling. Canna coco A+B, Rhyzotonic, Cannazym, calmag normal feeding. 800ml twice a day in Coco/perilite 70/30. pH 5.8 and EC 1.7 in and pH 6 and 2-2.4 out (100-150ml in saucer). 5gal fabric pots. 2 plants look like this and the third is thriving.
Can anyone help?Leaves. Curl up
a year ago
5
Solved
BLAZED
Older leaves are yellowing, brown/red rusty spots, dying tissue, red stems.Older leaves have brown/red rusty spots and looks like dying tissue in between the veins.
Burnt tips, and yellowing leaves.
The soil was really dry and my PH meter was 0.4 too high.
I gave each plant 3L of water with EC: 0.0 PH: 6.4 to check runoff.
Runoff was PH: 6.1 EC: 0.8a year ago
3
3
Solved
StarfishSmallBatch
Magnesium Deficiency?Is this plant suffering from Magnesium deficiency? I noticed some of the growth is yellowing and the leaves are curling upwards at the tips. The tips of the leaves is where most of the discoloration is as well.Leaves. Curl up
Leaves. Color - Yellow
a year ago
1
Solved
Lemme_Adam
Nitrogen toxicity? Deficiency? Something else? Stumped!I don't get it. Is this N toxicity? Serrated upturned edges, clawing, slow growth. But how? FFHF 75% FFOF 25%. Just Cal-Mag water. No food. NLS in bottom 3rd of pot. Not wind burn. Not too hot/dry at all. N deficiency? Yellow leaves on first bottom two only. I'm stumped.a year ago
4
4
Solved
MakeMeSleepy420
New growth is light green? (1st grow)New growth is light green – seems like Nitrogen deficiency or maybe light-burn? It's been getting slowly worse. Water ph is 6.7, Fox Farms nutes, AC Infinity 4x2 w/ 200w lights @ 18" on 80% power.Leaves. Curl down
Leaves. Color - Pale
Other. General questions
a year ago
2
5
Solved
safooo
if some one could please advice about is that curling or will just be fineWeek 2
Leaves. Curl up
a year ago
8
5
Solved
Mokorelsare1
Deficiency or toxicity?Hello i'm not sure what's going on, is this toxicity or deficiency? She loojs happy overall but new leaves have weird color, curled down tips, some of em are yellow and some are brow - burned.. maybe it's because she's transforming into bloom phase, PH 6.2 but runoff is PH 7.1.a year ago
5
2
Solved
ObserverInterest
Is this nute or sun burn? What should I do to save my babies ?I upped the nutrients to week 2 of veg state (biobizz) and put the light to 50% intensity. I put the light at 6 inches above recommended height (which is recommended on the Mars Hydro website for beginners). . IS THIS NUTE BURN OR LIGHT BURN?a year ago
7
4
Solved
OldStonedScottishGuy
Leaf Curling and yellowing on three week old plant, how to stop this gettign worse?I am getting leaf curling and yellowing on my 3-week-old Hulkberry plant. I suspect nutrient burn, even though I am using what was recommended by my local grow shop and also RQS's website. I have reverted to water only and raised the light higher. Anything else?a year ago
4
4
Solved
Mastr
Leaf burnHi everyone again I'm back lol I seen deficiency in leaf is it low ph ???Ph was 6 and I been told to raise it to 6.3 or 6.5 for other plant is she same??or if not please tell mo how to treat it thanks I don't want to ruin this grow that's why I'm bit worried thanksWeek 8
Leaves. Tips - Burnt
a year ago
1
3
