Back to Grow Questions

Patch on Leaves

GrowerfromSrilankastarted grow question 5h ago

My canopy is getting very close to the grow light. Could this be light/heat stress, or does it look like a nutrient issue? My recent input EC was 1.55 and runoff EC was 1.40, with input pH 5.95 and runoff pH 6.40.

GrowerfromSrilanka

GrowerfromSrilanka

GrowerfromSrilanka

GrowerfromSrilanka

Open

Leaves. Color · Black or grey

likes

Answer

Green_Clawsanswered grow question 10h ago

It's nute burn but doesn't look bad we use this as an indication to what's going on and what she can handle nutrients wise...balance it out n grow on

2 likes

Complain

Similar Grow Questions

Solved

Deficiency? P?Looks like my girls have some deficiency, anyone know what it is and how to fix it organicly? Looks like potassium to me?

Leaves. Color · Black or grey

3y ago

1

3

Solved

dark discolouration developing in flowering wk 3 howdy growbuds, noticing the pictured discolouration. hope someone w more experience/knowledge might recognise what's happening to my gals before it develops. advice/opinions welcome on if maybe nut burn/def, temp or ??? a heap more detail in entries to help diagnose. cheerz 🙏

Leaves. Color · Dark-brown

Leaves. Color · Black or grey

Feeding. Deficiencies

6y ago

2

4

Solved

Popped up around last week (week 4, monday). Prior to week 4, i had been watering with tap water, which in my area is pretty hard.(7.8+ pH) Been correcting pH to 6.8 with each watering since. (2 waterings since then.) Should i just continue feeding 6.8 pH water or add cal-mag?

Leaves. Color · Black or grey

8y ago

2

4

Solved

Blackening leaves on 2 week old seedling.Any ideas what has caused the blackening on the leaves? More effects of the overwatering? Hope it's not a lost cause but I'm losing hope.

Leaves. Color · Black or grey

7y ago

2

1

Solved

Black marks on leaves of a slow grower.Noticed there's black markings on the edges of the leaves on our slowest growing plant. My initial thought was water droplets sitting on it before it had fully broken out or could it be something else?

Leaves. Color · Black or grey

6y ago

1

1

Solved

lovely_neighbours

Brown black spot crispy edges I need help! Northern Light has Reddish brown spots turning dark-gray and crispy dark edges on the top leaves! It looks like a different issue from week 6 where gray spots appeared on the bottom leaves? Any ideas? Thanks

Leaves. Edges burnt

Leaves. Color · Dark-brown

Leaves. Color · Black or grey

4y ago

2

2

Solved

Please see the 2 photos marked in the diary. Is this a classic PK burn? Did a feed with no MegaCrop, no cal-mag, just PK boost at diluted dosage. The coppering and yellowing has come sudden. Leaves are crispy where burnt. I hear its easy to burn with PK boost. Did I do that?

Leaves. Color · Black or grey

7y ago

5

2

Solved

Dunkle Flecken auf den Blättern.Hey.. On one of my White Widow plants, dark spots have been appearing on the leaves for days, and today I've also noticed the first spots on a Blue Dream.. Can someone tell me what's going on and how I can get rid of it? Removing the affected leaves hasn't helped.

Leaves. Color · Black or grey

5y ago

2

1

Solved

greyish leaftips and dieing branches after topping the highest branches died after topping. It looks to me like they had the same symptoms like some new upper branches are developing now. It looks very dark & feels soft Temps were 17-19°C & Humidity was 90%+ Water should be PH5.9, think ph reader might be wrong and ph is too low?

Leaves. Color · Black or grey

2y ago

1

1

Solved

Hello, do the leaves of the plants get darker if you give more nutrients before they show signs of over-fertilization? I use Canna aqua. I know that if I give too much nitrogen, the plants get darker. But is it the same with too high EC?

Leaves. Color · Black or grey

6y ago

1

2

Solved

Purpel oder mengel ?Are my Gorilla Zkittlez drooping or is that a deficiency or problem?

Leaves. Color · Dark-purple

Leaves. Color · Dark-brown

Leaves. Color · Black or grey

6y ago

2

2

Solved

Leaf colour black

Leaves. Color · Black or grey

3y ago

8

4

Solved

Leafs dying off yellow/dark brown/ black Leafs slowly went from yellowish to yellow green dark brown black not sure whats causing this im not measuring ph so that could be first step to solve i guess cal mag P deficiancy????? definitely had some light burn as MH fce 3000 goes to max when its on 80prc lesson learned

Leaves. Color · Yellow

Leaves. Color · Black or grey

Plant. Stem · Red or purple

4y ago

2

4

Solved

First time grower in soil - Plant problem I am a first time grower in soil. This plant is an autoflower and is 25 days into flowering. Can someone please help diagnose this? All the leaves are starting to turn yellow as well.

Leaves. Color · Pale

Leaves. Color · Black or grey

3y ago

5

3

Solved

Yellow leaves with grey/dark outline I have some yellow leaves with grey/dark outline. Do you know the cause? Could be the humidity level too low? or K deficiency?! I'm not so sure about the last one. Help me guys please.

Leaves. Color · Yellow

Leaves. Color · Black or grey

6y ago

2

3

Solved

Help! Black Weed!Help! Almost ready to harvest on the winter solstice. Black weed

Leaves. Color · Black or grey

10mo ago

9

8

Solved

Need some help, I'm really lost Hi people, need some serious help here. The new leaves look like sh¡T. They are kinda yellowish and the tops are necrosed. Some spots on the leaves too! I added some silica in the last water but I don't know if was the cause. Soil pH varies between 6.5 and 7.0. Any ideas?

Leaves. Color · Yellow

Leaves. Color · Black or grey

4y ago

7

Solved

Weird coloured leaves The leaves are yellow a bit on the outside and just today noticed that it looks kind of black too. Anyone know if this is because of a certain deficiency?

Leaves. Color · Black or grey

6y ago

5

5

Solved

Grey spots appearing on both sides of leaves on this seedling. Already receiving light feed grow+calmag. What could this be?

Leaves. Color · Black or grey

5y ago

2

2

Solved

herbalistssword

Grey leaves Noticed some leaves getting a brown grey colour. Any idea what this is? Seems to only affect leaves on one branch

Leaves. Color · Black or grey

6y ago

1