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
greyish curling leaf tips and dieing branches after topping
1juan420started grow question a month ago
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 be 5.90%+ Water should 9, think ph reader might be wrong and ph is too low?
likes
Answer
Spike_KCanGanswered grow question a month ago
Hi bud.
Looking at your diary, it seems you've been having nutrition issues for a while. Unfortunately you don't mention which BioBizz nutrients you are using nor how much and how often you are feeding.
75-98% RH humidity?? Is this correct? No matter the feeding, I can imagine humidity above 70% rh is driving her nuts.
And then the PH.... you use soil and give her water ph'd to 9? PH above 7.5 can cause the roots to stop up-taking nutrients. That may be what you are experiencing. Generally, the ph of the water should be around 6.5 with runoff no higher than 7.5 Or is there a reason you run the water so high?
likes
Complain
Similar Grow Questions
Solved
Chillymann
Black poison is starting to show her colors.What can i do to speed up or enhance this process.See photos.This is a outdoor grow .Week 16
Leaves. Color - Black or grey
5 years ago
1
Solved
ButtersStotch
Leaf DeficiencyWhat deficiency do you think this is?Week 10
Leaves. Color - Black or grey
5 years ago
4
4
Solved
Fishcake
Black/brown spotshi all its currently day 14 of flower i have noticed that there is spots on another one of my plants hope you guys could help me outLeaves. Color - Dark-brown
Leaves. Color - Black or grey
Feeding. Deficiences
5 years ago
2
2
Solved
U2malone
Bud leaves turned blackTop leaves turned brown overnight, That day I did come home to a disturbing temp off 31oC . It’s the black Mini leaves in buds that are worrying me more. lights came on accidentally for two hours so gave her 16hrs dark and back to 12/12
This may have contributed.Week 18
Leaves. Color - Black or grey
5 years ago
1
Solved
Herbz_Unkraut
What Deficiency?What deficiency does this plant have?
I have 15 plants inside this tent, all get the same nutes, all look great but only this one has these grey marks on the lower leavesLeaves. Color - Black or grey
5 years ago
1
3
Solved
Smokeyboar
leaf problem what would it be cheersLeaf problemLeaves. Color - Black or grey
5 years ago
1
2
Solved
urbanbud
dark discolouration developing in flowering wk 3howdy 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 🙏5 years ago
2
4
Solved
portcityplug
Flower developmentI'm starting my week 3 of flower I'm starting to notice inside of my canopy some of my leaves in Bud sites are getting very wilted and going black could this be the start of a mold or is this a natural thing should I remove anything that looks like this ? Also my humidity is 70Leaves. Color - Black or grey
5 years ago
1
1
Solved
Aragon
Dark spot on the leaves of my seedlingHello, i have a weird dark spot on my seedlings idk what it is and if i should be worried. I know on these genetics the leaves can turn dark purple but I don't think it would be happening this early. I fed them nutes for the first time yesterday and today this dark spot appeared.Week 3
Leaves. Color - Black or grey
5 years ago
2
2
Solved
TupacFR
Old leaves , black spotHello ,
today i cutted some leaves lowest who were yellow , on the plants.
these leaves do not have much light.
but i found some black spots and i don't know if it's lack of sun and simply died ?
Can i just cut them ?
What do you think about that ?
ThanksWeek 9
Leaves. Color - Black or grey
5 years ago
1
2
Solved
OneBakedWalrus
Black tipsOne more. What's up here? Its happening to 2 plants but I've no idea why. No changes no stresses.looks like a nutrient problem. But if it is what is it and how do I fix it? I dont usually feed but if it will help ill get something.Leaves. Color - Black or grey
4 years ago
1
1
Solved
herbalistssword
Grey leavesNoticed some leaves getting a brown grey colour. Any idea what this is? Seems to only affect leaves on one branchWeek 19
Leaves. Color - Black or grey
4 years ago
1
Solved
BigGing432
Nutrient Burn, Leaf Septoria, Nutrient Deficiency? Or something else?I have been having issues with the Purple Haze. I've tried adjusting the Temperatures, adding additional Cal-Mag, changing lumen intensity etc.
I believe this may be nutrient burn?
Added an old image of leaf before mainlining, the plant is 1 week old after mainlining was done.4 years ago
3
3
Solved
PurpGod
Nitrogen toxicity? Kind soilHow to treat nitrogen toxicity in roots organic soil with kind living soil in bottom 1/3 . only watered 6.0 purified water.. week 3-4 flowerLeaves. Curl down
Leaves. Color - Black or grey
Other. General questions
4 years ago
2
3
Solved
eldruidamx
What is....?Hello. Please help me identify the problem ... today the 8th week of vega ended, and some kind of illness began.(((Week 8
Leaves. Color - Black or grey
4 years ago
4
3