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
Hi fellow growmies, Could you identify my problem...
Qutro
started grow question 4y ago
Hi fellow growmies, Could you identify my problem out here please? Is it a heat stress or stg. else?
Solved
Leaves. Color - Yellow
likes
Rookie_grows
answered grow question 4y ago
Personally I would say nutrient lockout rather than one specific issue, check the run off ppm and Ph and adjust accordingly then feed at half strength. PK and calmag are both notorious for causing lockout in the medium
1 like
Complain
Selected By The Grower
Similar Grow Questions
Solved
Murrod9106
Nutrients
Can anyone tell me if my ladies are lacking nitrogen
Leaves. Color - Yellow
Feeding. Deficiences
5y ago
2
2
Solved
TheObserver
Flushing time?
Hi good people, do I have to start flushing on one of my two plants? Just started week n.14 from seed. Beside the wind burn, will She be ready to be harvested in 2 weeks?
Buds. Other
Leaves. Color - Yellow
1y ago
1
1
Solved
arctic
Hi all! :( I am using RO water 030ppm. 200ppm(0.4ec) canna calmag agent 400ppm canna aqua. HPS 600w. 25с, 40-50%H, ph 5.7-5.8 total ppm ~ 550-650. I d
Hi all! :( I am using RO water 030ppm. + 200ppm(0.4ec) canna calmag agent + 400ppm canna aqua. HPS 600w. 25с, 40-50%H, ph 5.7-5.8 total ppm ~ 550-650. I don't understand what's going on: (all young plants get older and similar problems begin. it cal mag deficiency?
Leaves. Color - Yellow
Feeding. Deficiences
5y ago
5
9
Solved
Dr_Zu
Seedling with yellow and brown tips
Any ideas why only one of the plants has started to turn yellow and brown at the tips?
Week 1
Leaves. Tips - Burnt
Leaves. Color - Yellow
4y ago
1
1
Solved
ThcSrb
Spots on leaves and little twisted...
Spots started slowly showing when it had a different 600w light, too much heat back then, this started a little "save operation" changed light, made the plants look a bit healthier but now it looks like the spots have spread and also affected the leaves above... Are they healthy?
Week 3
Leaves. Twisted
Leaves. Color - Yellow
Leaves. Color - Dark-brown
5y ago
1
5
Solved
happykat
Is the slight yellowing ad curling of these leaves ok or indicative of something?
Curling and yellowing of leaves in a few instances, both near the top and bottom of the plant, with no noticeable discoloration on the branches in between. I'm feeding it 1/4 strength Grow Big (2Cups) and 1/4 strength CalMag (1Cup) when I water every 3rd day. Ph runoff 6.8.
Week 3
Leaves. Curl up
Leaves. Color - Yellow
Feeding. Schedule
4y ago
1
1
Solved
Jake75uk
Yellow leaves working out towards tips
Yellowing of lower leaves, from the stem working towards the tips. It’s been hot and they’ve been home alone for 5 days with just one water on the 3rd day. They had a small amount of bloom just before I left! During veg they were on fish mix, but not very much (1/2 dose).
Week 5
Leaves. Color - Yellow
5y ago
2
2
Solved
nancypotwin
skinny yellowing leaves
hi! can someone help me identify this problem? my plants are a little behind (7 weeks old) but i have an issue w/two of them... the leaves are skinny and yellowing and pretty far apart the new growth starts off green & skinny and canoeing immediately. temp is around 73-75f
Leaves. Color - Yellow
5y ago
1
2
Solved
ganzigunnu
yellow rusty leaves
entering 6th week for masterkush and it looks like this maybe i defoliated it too much. what you think? biobizz lightmix just plain water with calmag so far. recently added a second light maybe it wants some nutrients. stopped growing for a few days...
Week 5
Leaves. Color - Yellow
4y ago
3
2
Solved
SilverSlapdick
Leaves yellowing and burning mid flower
Air exchange, pH, nutes, and water should be good. Could my 230 watt on 100% be too much for her? Does she need more humidity? What causes crispy leaves?
Week 7
Leaves. Edges burnt
Leaves. Color - Yellow
4y ago
1
3
Solved
crusoe
Yellow leaf tips and edges
Hi I've got a problem that I've seen from the start of my grow and it's getting worse on older leaves now - zoom in edges and tips are turning yellow. I thought it was magnesium so I've dosed with Calmag but it's not improved - I'm Ph6.5 - any ideas?
Week 4
Leaves. Color - Yellow
Leaves. Color - Mottling
5y ago
1
Solved
seEdcork
Help! What is this?! Upper leaves turning yellow/brown but not the lower ones. Light burn?
Leaves. Edges burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
2y ago
1
1
Solved
KittyKitKat
Lockout or not enough nutrients ?
Hi grow fam, I’m starting to see some slight discolouration on a couple of leaves. I’m wondering if it’s being nutrient deprived or locked out. I am leaning on the side of caution by using GH’s light feed schedule. No signs of root rot inside the bucket
Week 3
Leaves. Color - Yellow
3y ago
3
4
Solved
TRS420
Stickstoff Mangel in der 4. Blütewoche ?
Hallo Tag 28 seit Umstellung 3ml/L Biocanna Flores Ph 6.6 Sieht nach Stickstoff Mangel aus, habe 0.5ml/L Biocanna Vega vor 4 Tagen als Stickstoff boost versucht, aber vergeblich.. Könnte mir wer helfen ? Ich mache wegen privaten Gründen kein Tagebuch Ich weiß das es besser wäre
Leaves. Curl down
Leaves. Color - Yellow
17d ago
5
3
Solved
CaptainKirk1188
Fixing deficiency/toxicity/overwatering issues
How do I properly identify and remedy these issues with my babies?
Week 12
Leaves. Curl down
Leaves. Color - Yellow
Feeding. Deficiences
3y ago
7
10
Solved
Granddaddy_Terp
What's causing my brown crispy leaves!?
Over the past week my plants have taken a turn for the worse. Many leaves went from yellowing to browning to completely crispy! Other leaves have brown spots on them and some of the stems are purple.
Week 8
Leaves. Curl up
Leaves. Color - Yellow
Leaves. Color - Dark-brown
4y ago
2
8
Solved
Chorizo555
What do you think is this?
Hi, what do you think is this? K deficiency?
Leaves. Color - Yellow
5y ago
1
1
Solved
Mraady
Runoff really matter ?
Day 35 After adding nutes i got runoff ph 4.8 Did flush with 15L ro water no change Another 15L with flush recipe ( 1ml/L cal mag and 2.5ml/5L tiger bloom ) slight change in ph around 5.2 After 30Liter flush i left plant alone its growing but i am worried ! Yellow new growth
Week 5
Leaves. Color - Yellow
7mo ago
2
11
Solved
EaRtH
Yellowing leaves - nutrient burn or deficiency?
Hey guys, it seems like my plants have some kind of problem. I'm in second week of flower with these autos and lot of leaves started to turn yellow and even purple with occasional spots. Im using Biobizz ferts with their nutrient schedule.
Leaves. Color - Yellow
Leaves. Color - Dark-purple
2y ago
1
Solved
ItsLegalInMyHouse
Hi all! I was checking on my plants and noticed one of them is showing yellow/brown spots in some the top leaves, only showing on 1 plant but I’m nervous it’s leaf septoria?? The plant is in week 10 and is my last pic on week 10 diary. Does anyone know what this could be? :)
Week 10
Leaves. Color - Yellow
7y ago
3
3