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
I added a couple pics of what looks like rust spot...
diamondtrichomes
started grow question 7y ago
I added a couple pics of what looks like rust spots on the leaves of only the tall plant in 7 gallon. I’ve given these two plants the exact same feeding so not sure what is causing it.
Solved
Week 5
Leaves. Color - Dark-brown
likes
Athos
answered grow question 7y ago
Looks like calcium deficiency, specially since it it's happened on the top leaves.
1 like
Complain
Selected By The Grower
TropicThunder
answered grow question 7y ago
Looks like iron or calcium to me.. Happy growing friend
1 like
Complain
Similar Grow Questions
Solved
torgul2000
Banana Blaze brown spots
Soil was missing for my Banana Blaze, I used some general soil.... but I now have some brown spots on the leaves. Any idea of what is occuring ? I changed form 1L pot to 3.5L pot and stuffed the pot with half general soil...not a good idea I know :-/
Week 6
Leaves. Color - Dark-brown
4y ago
4
3
Solved
tangie
Dark purple areas on leaves — genes or environment/feeding problem?
What the heck is this? Is it just purple genes or a stress/deficiency or a combination of multiple factors? I have checked three visual cannabis plant health guides, and did not find a single issue which looks like this. Maybe a combination of 2 factors, but I'm not convinced 😐
Week 9
Leaves. Color - Dark-purple
Leaves. Color - Dark-brown
1y ago
6
6
Solved
GrowerNL
My runtz are drooling since the beginning i am growing on coco watering once every 4-5 days on this picture i haven’t given water for 3-4-5 days I have a repost its a update My runoff is 7800 EC pH 5,66 but i gave it 1200 my last watering i am gonna flush
Leaves. Curl down
Leaves. Twisted
Leaves. Color - Dark-brown
5y ago
2
2
Solved
CollectiveSol123
How can I fatten my buds up..new LEDs soon..that will help..
Week 28
Leaves. Color - Dark-brown
6y ago
1
1
Solved
Kygrowaddict
Hey all my grow is near complete and I am dying to try it!! I was just wondering if anyone takes theirs with the trichomes the way mine are and am I looking at them right to determine they are almost ready through my eyes lik
Week 9
Leaves. Color - Dark-brown
6y ago
1
2
Solved
OrionGrowgul
Was haben meine Pflanzen?
Liebe Community, Neuling hier :) Ich habe zwei Critical Kush Auto in der 7ten Woche die seit der Blüte eine leichte Nekrose/Verfärbte Blätter haben. Leider habe ich vor 3 Tagen erst das erste mal mit Hesi Bloom gedüngt 5ml/L, vorher noch garnicht. Mehr Düngen? weniger Licht?
Leaves. Color - Pale
Leaves. Color - Dark-brown
6mo ago
2
2
Solved
WeGrow
Root rot?
I discovered some brown spots on leaves....please tell me that this not root rot 😨 Some leaves that looked worse had been removed last week, I thought that this was just a nutrition issue.
Week 5
Leaves. Color - Dark-brown
4y ago
3
3
Solved
Granddaddy_Terp
Brown spotting?
Hey everyone! My plant is in her 5th week and a few days ago (around day 30) I noticed some brown spotting on a few of the mid/lower leaves. Does anyone know what this could mean? I gave her her first feeding 3 days ago. 1/4 strength veg nutes and 1/8 strength bloom nutes.
Week 4
Leaves. Color - Dark-brown
Leaves. Color - Mottling
4y ago
1
3
Solved
Terra_Farma
Brown Patches on Older Leaves
Slight yellowing and brown mottled patches. Only on one of the two plants and they’ve been treated and fed exactly the same. On some older fan leaves, no signs of anything on new growth. Anything to worry about at this stage? Maybe just a sensitive pheno? Any advice appreciated.
Week 7
Leaves. Color - Dark-brown
5y ago
3
3
Solved
HYDRO_LIGHT
How to recover best? Burn, heat or root rot?
I'm growing DWC in a tent and was going great until two days ago when the air tub came out of the pump for half the day so water wasn't moving AND its got to about 96 degrees in the tent. Now all the top flowers are getting crispy and brown and thin. Help!
Leaves. Curl down
Leaves. Color - Dark-brown
Plant. Wilting
5y ago
2
3
Solved
depplover49
It looks like my plant is dieing! Plants turning brown after intense watering period
Did I drown my plant? Stress it? I gave a lot of water in a short duration of time, and now 7 days later she is looking terrible! Read my diary on week 17 for more info!
Week 17
Leaves. Curl up
Leaves. Color - Dark-brown
Techniques. LST
3y ago
4
3
Solved
Mr_ROCKET
What are this dark blurs?
Today I found this dark brownish/bluish blurs on these two leaves. Does anyone know what are they? My plant is on her last weeks and I am not feeding her but with ph'ed water.
Week 10
Leaves. Color - Dark-brown
Leaves. Color - Mottling
5y ago
3
3
Solved
growbie
Brown dots on leaves
Leaves I really dont know whats going on... Something is wrong. It looks like leafs are burned by over feeding, but i only used mycorhiza. Does anyone know what happend? Or any advice how i can fix it?
Leaves. Color - Dark-brown
6y ago
2
1
Solved
Tango_Hotel_Charlie
Brown spots
What is this? It's affecting newer growth, first or second set of fan leaves off thee top of the colas. Also, this drooping, is this stress from the light? This is the center of my tent, and would appear to only affect tallest colas of this plant.
Leaves. Curl down
Leaves. Color - Dark-brown
Setup. Lighting
5y ago
5
Solved
sompas
Cannabis leaf symtomp
Need help Day42 what wrong with this plant
Week 6
Leaves. Color - Dark-brown
5y ago
4
Solved
Wildgrass
Leaves turning yellow with brown patches
I noticed the first real leaves on one of my plants turning yellow in FFOF. I transplanted them into bigger pots with ProMix M in hope that it would stop. Condition seems to continue worsening. I have started to notice the cotyledons on some of the plants turning yellow.
Week 4
Leaves. Color - Yellow
Leaves. Color - Dark-brown
6y ago
2
2
Solved
CoolGuy123
Why are some leaves forming small brown dots?
What are these leaves doing? It seems to only be these 2/3 and I wonder why they form these brown spots.
Week 4
Leaves. Color - Dark-brown
8mo ago
1
2
Solved
Bezenga
Spots on leaves
These spots appeared on two leaves of the plant. The color is something between orange/brown. Could be dangerous? I almost have sure theres no much watering. What could be? Thanks a lot! Im sorry for my english.
Week 3
Leaves. Color - Dark-brown
3y ago
2
2
Solved
EvilGrower
Brown spots on some leaves
Hello! I've noticed some brown spots on some of my leaves, localized to one half of the plant. Any ideas what this could be?
Week 7
Leaves. Color - Dark-brown
5y ago
1
1
Solved
FiFrElOt
Demande de diagnostic
Bonjour, je suis actuellement en semaine 7, mon problème dure depuis la semaine 5 et je n'arrive pas à l'identifier... Quelqu'un à déjà eu un problème comme celui la?
Leaves. Color - Dark-brown
Leaves. Color - Black or grey
Feeding. Deficiences
4y ago
2
2