The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Login
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
Login
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
What is this?
Highway93
started grow question 4y ago
Jemand helfen?
Solved
Leaves. Color - Yellow
likes
KushGANG
answered grow question 4y ago
Hello it seems you have potassium deficience and/ or calmag deficience it will be easiest to tell it if you put a photo whithout the purple light. Hope this helps you. Good luck
1 like
Complain
Selected By The Grower
Similar Grow Questions
Solved
southerngrower2020
Leaf damage and flower analysis
Asking for thoughts on leaf damage. I think there may be nutrient shock so I will be reducing PPM to 800 to see if that helps. I am confused by other problems seen on a few leaves. I also want to ask if I am getting close to harvest (check flower pics) since this is an autoflower
Week 6
Leaves. Edges burnt
Leaves. Color - Yellow
Leaves. Other
6y ago
4
3
Solved
statzzz
My plant is starting to wilt. They also are getting yellow streaks. It is now 4 weeks old. Temp 83 Humidity 50 PH 6.2 EC 2040. This happened in my last grow also.. Please anyone.. Why is this happening. Thanks.
Leaves. Edges burnt
Leaves. Curl up
Leaves. Color - Yellow
3y ago
1
3
Solved
Skyhi
Not sure why the plants leaves are curling downwards. Slight yellowing and red stem on one seedling. I havent fed much nutrients so I dont think its nutrient burn. Can anyone tell we what Im doing wrong? Assistance will be much appreciated
Week 2
Leaves. Curl down
Leaves. Color - Yellow
Plant. Stem - Red or purple
4y ago
3
3
Solved
ganzigunnu
yellow spots first week!
what does this mean? first time seeing this. its also wilted a bit. only 7 days old. didnt measure ph. im not even watering them.
Week 1
Leaves. Color - Yellow
2y ago
4
6
Solved
Hazeterpz
First time coco grower
Hello guys, first time growing in coco I’ve been feeding them 0,7 until now at 5.8 ph and today I added 1.2 ec and the runoff was 5,6. It’s been 3 weeks now and they’re not growing that well I’ll feed 6,5 next feeding. Can someone tell me if this is a calmag deficiency ?Anytips?
Leaves. Curl down
Leaves. Color - Yellow
Feeding. Deficiences
5y ago
5
6
Solved
Unkraut
Defiencies?
It seems i have 2 kind of defiencies 1 plant gets yellow on top 3 plants seem to get red/brown/yellow I checked PH of the soil, looks good -> 6,8 I checked EC of the soil it's 1.8-2.0 I use bio nutriens from biocanna + some cal/mag -> my water has alot of calcium in it in my town
Week 11
Leaves. Color - Yellow
Feeding. Deficiences
6y ago
5
4
Solved
Growing_Spartan
Anyone know this yellowing?
Hello everyone, I’ve got 2 autos going from 420FastBuds and im starting to see some yellowing in the leaves. I didn’t PH till I saw their first set of leaves and I was using bottled water but now I have my water dechlorinated and ph set to 6.4 for every watering.
Leaves. Color - Yellow
2y ago
1
Solved
GarenMaster420
Leaves doing weird stuff
My leaves on one plant are doing this weird thing where some parts are yellow'ish. It looks like a mutation. She is getting the same nutes as the other 3 plants in the garden and they aren't doing this. I've never seen this before so I'm not sure what I'm looking at?
Week 8
Leaves. Color - Yellow
3y ago
6
5
Solved
Quangro
I'm not experience in growing and this is my first plant. I'm still worried by the yellows of young shoots. Can someone help me recognize the problem ? 🙏 All suggestions will be valuable. 👍
Week 10
Leaves. Color - Yellow
Feeding. Deficiences
6y ago
7
3
Solved
Dankenstein666
Deficiency
Anyone shed some light on the state of the leaves in the pictures of week 7? Thank you
Week 7
Leaves. Tips - Burnt
Leaves. Color - Yellow
5y ago
2
2
Solved
Panacelsius
Why this happens? Leaves turning dark to yellow
After water + applying fertilisers BioBizz flowering week 4 (see chart) the leaves turned dark and in a few hrs started yellowing. The runoff EC usually is a little lower than solution EC. pH around 6,25-6,5
Leaves. Color - Yellow
16d ago
12
10
Solved
Finch
Color of leaves
What do you think is causing this leaf to turn yellow
Leaves. Color - Yellow
6y ago
4
Solved
SmokeableHobby
Does this look like a calcium deficiency?
Seeing yellowing/browning on the fan leaves for my bonsais. Is this a calcium deficiency?
Week 4
Leaves. Color - Yellow
Leaves. Color - Mottling
5y ago
3
4
Solved
dubya
Can this stretched seedling be saved?
So, my first seedling spent a few days w/weak light and got stretched. I then started “Shorty”; both outdoors the last three days. I buried “Stretch” 3/4” deeper. Is “Stretch” (the first plant) totally fucked? Anything else to do? 1st pic is Stretch, 2nd pic is Shorty.
Leaves. Color - Yellow
Plant. Stem - Weak
Setup. Seedling
5y ago
3
6
Solved
JoshuaTreez
What do you guys think is the culprit with this plant? Crazy heat wave, been 30-32 in the tent 24/7 just cranked the exhaust fan
Week 7
Leaves. Color - Yellow
5y ago
3
2
Solved
I_Love_Kush
Brown / Yellow / Rusty Spots
Hello Guys! Today I noticed a lot of brown / rusty spots on my plants sugar leaves, and I am wondering what it is and could be. I am concerned. These are clones of a CBD strain. PH always is 6.2
Leaves. Color - Yellow
3y ago
2
6
Solved
Rollex420
Deficiency or light stress?
I start by saying that the light was not close enough to cause stress imo.. was about (30cm) of distance from this plant. it seems that it is more a deficiency in my opinion but I don't know exactly which one.. What do you think about that?
Leaves. Color - Yellow
Leaves. Color - Pale
Feeding. Deficiences
5y ago
2
2
Solved
Vexar
Yellow tips and curled down leaves
I don't understand what's happening, my plant has started to show a calcium deficiency and so i gave her 2 ml/l of calmag but it also has those yellow tips and leaves that curl down
Week 4
Leaves. Tips - Burnt
Leaves. Curl down
Leaves. Color - Yellow
6y ago
3
3
Solved
Downyowo
Is this BCTV?
I didn’t do PH first time And give too many PPM. pH 9.0 water also. But i wanna know. Is BCTV or not If BCTV going out
Leaves. Too many
Leaves. Twisted
Leaves. Color - Yellow
4mo ago
7
3
Solved
Szamba
Yellow leaves
Leaves. Color - Yellow
8mo ago
2
2