The Grow Awards 2026 🏆 
Nutrient deficiency
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known2funk
We've had some really warm weather the past few days. This morning, just before the lights switched off, i saw it was 31.1 degrees C in the grow tent. Are the yellowing leaves a concern? The yellowest leaves are really brittle. I don't believe they're under-waterd.Week 13
Leaves. Color - Yellow
4y ago
2
2
Solved
Maincard
Yellow leavesHello it is day 36,i had pH issues but i corrected it to 6,5 but the leaves are still yellowing .I currently use canna nutrients, Flores, boost, ryzotonic and canazym. I use tap water and I'm growing in a soiles medium,(coco, peat moss and perlite. ThxLeaves. Tips - Burnt
Leaves. Color - Yellow
4y ago
3
3
Solved
kevzzz
Is this sight yellowing normal or cause for light concern? No nutrientsDoes it look like the new leaves on my 7 day pictures are slightly yellow? Or is that relatively normal with new growth? 20% perlite, 30% coco, 50% organic potting mix. Been really light handed on the water. waiting until soil is completely dry before watering more (1-2 days)Week 1
Leaves. Color - Yellow
6y ago
2
1
Solved
Lasninasverdes
¿Qué creéis que le pasa ?¿Qué opináis ? Riego con biobizz 1,2EC
Humedad 40%. Temperatura 24-28 grados centígrados. Ph 6,1Leaves. Color - Yellow
Leaves. Other
Plant. Other
4y ago
3
2
Solved
Kenderbetyar
Yellowish leaves/Slow growthThe leaves seem to be a little yellowish,any ideas what could it be? Also,I have noticed that a lot of growers are in the flowering stage ,maybe it's just my impatience but I think they are growing a little slower than normal,perhaps that's because the room temp?5y ago
2
1
Solved
totemas69
Leafs dying off yellow/dark brown/ blackLeafs 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 learnedLeaves. Color - Yellow
Leaves. Color - Black or grey
Plant. Stem - Red or purple
3y ago
2
4
Solved
Miller6610
Heading into about 3rd week of flowering and seeing some yellowingAbout 3rd week of flowering but I have been seeing yellowing leaf tips starting on top newest growth first and now seems like I'm having older larger leaves yellowing and burning now. Not sure if this is lockout or a deficiency or something else?Leaves. Tips - Burnt
Leaves. Color - Yellow
7mo ago
1
Solved
CuzICann_abis
On Week 11 Day 74, I've been noticing the leaves turning yellow. I'm assuming because we're getting close to harvest, but after reading more about nutrient deficiencies I'm wondering if I should be doing something about it. I started flushing a 1.5 weeks ago.Week 11
Leaves. Color - Yellow
6y ago
4
4
Solved
towellie
Leaves with yellow spotsWe have find some leaves with yellow spots in them. The tips on new leaves are also turning yellow. Is this nutrient burn? Searching online I found it may be due to pH fluctuations, although we use pH controller with ferts (before ferts only bottled water pH ~5.5).Leaves. Color - Yellow
3y ago
1
2
Solved
BudDonis
Yellow canopy Nutrition deficit?Hi guys can some one help?
Is this magnesium or iron deficit? Or smth with roots?(canopy is yellow)
Ph of soil was almost 5.8/ 6 smth
I had some days a bit heat about 27 /29 degree but the plant next to it looks great they both got some biobuzz grow 4 days agoLeaves. Color - Yellow
2y ago
3
4
Solved
ezgrows4anoob
What's going on with my clones? Do not have much information to add. VPD is not terribly off, DLI around 25.What's going on with these clones? Not sure what it could be. They could possibly be rootbound. They should have been transplanted a few weeks ago but I did not have the space.3y ago
3
2
Solved
BrenBlaze
Looking droopy/yellow due to light burn?Looking like light burn (most intense from the top) and maybe overwatering?
I am trying Nectar for the Gods #4 soil for the first time, and I just put it in a grow bag and put the clones in it. Unsure if I was supposed to prep somehow beforehand.4y ago
3
3
Solved
Onandon
Kill or cure - yellow leaves from day 5Hi all.
Started a 6 plant grow on the 17th dec but one of the plants is struggling.
For the first 4 days they were under clear plastic beakers to up the humidity. On day 5 they were all looking fine but this guy had a few brown marks on the leaves and have now turned yellow.Week 2
Leaves. Color - Yellow
5y ago
4
Solved
Snakeking
Why my plant is in shock i fixed the ph of watering .I suspect of this reasons:Heat wave/changing phase to flowering / nutrient locked/ over watering/. InI lowered the ph of watering from 6.8 to 6.0 but this plant is still is shock and wont grow like others.
Could it be a sign of changing phase from veg to bloom ? 3 weeks ago my first plant went to flowering and did the same color fading. Now that plant has good colorWeek 18
Leaves. Color - Yellow
2y ago
2
2
Solved
GhettoStyle
friends please tell me why the leaves are this color!At first I thought it was a deficiency now I think it's an overdose!Leaves. Color - Yellow
Other. Other
Feeding. Other
5y ago
3
Solved
BongRip
1st Week ProblemMy plants are in day 7 and I noticed some problems with it. A new set of leaves is coming out yellow in one of my plants and also I am seeing some spots on 2 other plants. They are under 200cfl with the distance of 6 inches. Temperature goes up to 85'F sometimes. Help out pls!Leaves. Color - Yellow
5y ago
4
4
Solved
fromseedtosmoke787
yellow spots !!my amnesia auto today the leaves has more yellow spots on them than 3 days ago fisrt pic 3 days ago and video from today only been feeding water PH 6.0 -6.3 any suggestion what could be and what to doe her grow hasent stoped yet any help! other 2 auto no yellow spotsLeaves. Color - Yellow
Feeding. Deficiences
6y ago
2
3