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
One of my leaves has a small yellow mark on it. It...
The_green_room
started grow question 5y ago
One of my leaves has a small yellow mark on it. It doesn't appear on any other leaves. Any ideas what this could be? I'm a first time grower so a bit nervous...
Solved
Week 3
Leaves. Other
likes
rhodes68
answered grow question 5y ago
Prob a spill from watering, drops of water will lens light and cause a burn. No worries sharp eye
2 likes
Complain
Selected By The Grower
Similar Grow Questions
Solved
Homestickycannabis
What is it ?
What do you all think this is ? Deficiency or nute burn ?
Leaves. Other
5y ago
1
Solved
fish_ringer
white dots on the leaves ( no spider mites) what is it?
there are dots on the leaves. i checked under the leaf, but there is no sign of spider mites. can anybody tell me what is it? (
Leaves. Other
4y ago
3
3
Solved
NIagaraFalls420
Any idea on what nutrient deficiency I'm having? plants are slowing starting to yellow at the tips of the older leaves as well as small yellowish/brownish spots. I think its either potassium or nitrogen. also whats the easiest way to fix? would manure and fertilizer work?
Week 2
Leaves. Other
6y ago
3
3
Solved
Growyourownathome2x2
Looking for thoughts or advice on my greenhouse blue cheese auto, I’m noticing spots on my leaves just after starting to flower about a week or two into pre flower stretch
Week 7
Leaves. Other
3y ago
5
5
Solved
MaryJones
What are these symptoms?
Hello everyone! My plant is currently experiencing a few symptoms that I don't quite understand. Pics 1 and 2 show them the best, with the leaves from pic 3 to 5 having similar, not so heavy symptoms. Pic 6 I believe is something else, Not windburn though, leaf is too far inside
Leaves. Other
5y ago
1
2
Solved
KCduzit
How do I achieve the dark green leaves wedding cake wants? (More nitrogen?)
My plants are looking overall healthy but are not as dark green as I’ve seen most plants at this stage of growth, or like my plant on the bottom right of the canopy. I am feeding/foliar treating the same amounts to all plants. wondering what to do or should I just chill out?
Week 8
Leaves. Color - Yellow
Leaves. Other
5y ago
3
3
Solved
auto_floo
Purple edges
Hi Gfam, What do they need? Or what’s wrong? These purple edges and light green color.
Leaves. Color - Yellow
Leaves. Color - Red or pink
Leaves. Other
4y ago
3
3
Solved
ganjapanda
Shall i remove the bottom 1/3 ?
Week 4
Leaves. Other
7y ago
3
2
Solved
ElMalo
I'm hesitant to defoliate since this is my first auto grow but the blueberry is damn bushy the tangerine dream could use a touch up too. Would you remove all the big fan leaves, half of them or what would you recommend? Tucking/tying down leaves is no issue if low stress is key.
Week 8
Leaves. Other
8y ago
8
5
Solved
guerilla
Calcium deficiency or fungus??
Iv just gone into 12/12 and what i thought would be fixed with simple calmag. Has got worse! Leaves are very yellow with brown spots.. Seems to be just brown spots on 1 girl.. :-(
Leaves. Color - Yellow
Leaves. Other
Feeding. Deficiences
5y ago
5
6
Solved
HazeyBobby
In week 12 of the diary I show the continued issue with yellowing and loss of leaves. One G13 plant has nearly lost all its leaves. I think I have a pest issue, see week 11 diary picture of the pot with lots of white tiny things crawling. Could this be root aphids?
Week 12
Leaves. Other
6y ago
3
3
Solved
RecreationalRoots
What could be eating my leaves?
My outdoor Gorilla Glue Auto is getting eaten by something. Any thoughts on what this could be? I have not seen any pests while doing checks and it is only this plant (I have two more outdoors in same are with this one). Part of leaf and even entire fingers have been eaten.
Leaves. Other
Other. Bugs
Setup. Outdoor
4y ago
3
6
Solved
thereshegrowz
Water flush ratio for nitrogen toxicity?
What is the rule of thumb on flushing ? I flushed 3 gallons of water on Day 17 and 18. Today, (day 19), I flushed w/ 5 gallons since the symptoms of nitrogen toxicity seemed only to be getting worse. Hoping that at least stops the progression of leaf clawing...
Week 3
Leaves. Other
4y ago
2
4
Solved
DeathInc
Some spots, looking for a little help
Need some help identifying a problem I think I am having with my plants. These spots have shown up in all of my plants and have only been on a few leaves, randomly, in the whole grow. Just need some help narrowing down the issue, if anyone has the time. Thanks! Limited text space
Week 3
Leaves. Other
4y ago
1
2
Solved
Splifflicious
Brown spots/yellow tips after accidentally breaking a blade
Hi! I accidentally broke an older blade from one of her leaves, and after a couple of days that leaf started getting brownish spots and slightly yellowing tips. Is this normal to happen after a broken blade and will eventually die off? Or is this any sort of deficiency? Thanks !
Leaves. Tips - Die
Leaves. Color - Dark-brown
Leaves. Other
5y ago
1
1
Solved
igglepuff
not sure whats wrong :( noticed small browning spots on some leaves this morning, when flipped over you can see the spots forming (not sure how to describe it), the darker green spots underleaf. Pests?Mag-def begging? what type of foliar pest spray do i try if pests?
Week 9
Leaves. Other
5y ago
1
2
Solved
LeastExpectedGrower
Small brown speckled spots on leaf of otherwise healthy plant?
Small brown speckled spots on leaf of otherwise healthy plant. Anyone pinpoint this deficiency or abundance? Northern Lights auto, 2nd week of flower. Feeding GH Trio, etc. Not showing on any other leaves, just this one.
Leaves. Other
4y ago
6
7
Solved
Dudders
What is this?
What is this and what action should I take?
Week 3
Leaves. Other
4y ago
1
2
Solved
FlynnRyder
I'm a slow learner...
Hey yall, having issues with red stems, ph fluctuations, leaf discoloring, and leaks but thats my problem haha. I just had a terrible week and I wanted to make sure a nute change was my only real problem in wk 4. I only wanted to veg 4 weeks but thats not possible or I botched
Leaves. Other
Other. Other
Plant. Stem - Red or purple
5y ago
4
4
Solved
Burrito
One leaf is super small, is it normal?
Week 1
Leaves. Other
6y ago
4
4