The Grow Awards 2026 🏆 
Black spots on leaves
Trickotreat47started grow question 2y ago
So I have those black spots on leaves on top of the canopy of my plants. Can someone please explain what are those and how can I treat it? Also the edges of the leaves on top of the canopy are brown and crispy.
Solved
Leaves. Color - Dark-brown
likes
Organomananswered grow question 2y ago
The burnt tips are a nutrition/pH issue.
The black blotches could be a fungal problem due to poor air exchange/high humidity.
Similar Grow Questions
Solved
Dillsnills
Some of the leaves on this one plant have brownish rusty spots on em jus looking for some jelpmplzzWondering what deficiency or nute burn or what is going on with this plants, a few of the leaves have minor tips that look brown and have brown kinda rusty spots on em, advice input opinions greatly appreciated. Orange Sherbert Auto, 3rd wk flowering,ph6.5, nute last feeding.Leaves. Curl down
Leaves. Color - Dark-brown
Setup. Strain - Autoflowering
5y ago
3
3
Solved
Ionic20
Advice please :)This is 24 hours later. Should I just give some calmag now even tho the soil is still damp?Leaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
5y ago
3
3
Solved
dillande3
Dry/Rot look on new LH day 52 from seed, Placing outdoor for week or 2 until I get proper Tent LED'sDay 35 Veg LH, issues, with lower branches, some of the New Toppings and Leaves looking dry/rot maybe over watering which i have no idea, it was under white CFL Bulb's and was inside 2x2 cupboard (MDF) and no control of RH, for 1-2 weeks, Going to put it outdoor for a week3y ago
1
2
Solved
MetaSamsara
How's the quality?How would you rate the quality of these plants? The dark brown leaves have me self conscious of the roots situation. DIY supersoil mix recipe here: https://pastebin.com/pbxMZysq I've added more dolomite & guano as topdressing and fed liquid calmag and potassium during flowering.Week 13
Leaves. Color - Dark-brown
2y ago
5
4
Solved
Splifflicious
Brown spots on some of top/bottom leavesHi all,
So I’ve been getting these small brown spots on some on her top leaves as well as on some of her bottom ones.
No idea what this is, for sure no Cal or Mag def as I have been consistently feeding her CalMag.
Thanks ✌️🏼Leaves. Color - Dark-brown
Leaves. Other
5y ago
2
Solved
Therapy420
Leaf discolorationWhat is happening to my leafs? Are they fading or is it nute problem?Week 10
Leaves. Color - Dark-brown
5y ago
1
1
Solved
Mysteriogo
Dead ?Hello guys,
My flowers seem dead, trichomes are not changing since 3 weeks. + Leaves are really horrible (that's broke my Heart)
Do you think I should harvest ? That's really clear trichomes and not milky... Still thc in there ?
Colombian jack strain, smth about week 27 ?Leaves. Color - Dark-brown
Other. Harvest - Drying
3y ago
5
4
Solved
nocluehowto
Should I cut these off ?leaves are no longer crispy and dry but are still rapidly changing colour, not sure if I should cut them off or let them fall off themselves ?
if I cut them off would it be beneficial ?
not sure if the plants still putting in energy to keep these leaves on the plant or not ?Week 2
Leaves. Color - Dark-brown
4y ago
8
5
Solved
Vyzon1
Ph issues leaves dyingI have a few leaves showing signs of ph issue, should I cut those leaves off now or wait until they die off?Week 3
Leaves. Color - Dark-brown
4y ago
12
8
Solved
Aonjacktallbeck
Ph problem?Is this a ph problem or something else? My meter doesn’t seem to be accurate. I’ve been feeding top crop veg once a week and ph 6.3 (soil), my run off was a bit high, a gave just plain water (ph 7) but no help. Photos from two plants. HeeelpLeaves. Color - Yellow
Leaves. Color - Dark-brown
Feeding. Deficiences
5y ago
1
1
Solved
THERMICDESERT11
Brown ruts spot on the leavesGrowing organically with happy frog mixed with a super soil concentrate. I water them with spring bottle water, ph at 7.7. Recharge every 10 days. Top dress 2-2-2 dry amendments and I top dress in week 4 of flower with the super soil concentrate.
My leaves has brown spots 🤦🏾Leaves. Color - Dark-brown
4y ago
1
3
Solved
MagicChelseaCrew
Lower Leaves turning brownIs this a nutrient deficiency? It's only on the lower leaves of both plants.Week 2
Leaves. Color - Dark-brown
4y ago
1
2
Solved
Maraviglosos
Bruising or nute problem?I do not have enough characters here, please check diary for details. Some tops are showing some problems. The thing is, only a few and it does not seem related to light distance. My first thoughts is this is bruising, but I would like some more expert opinions.5y ago
3
Solved
xXMoraisXx
Leafs problemHi guys im really worried the plant doesnt seem to be on good path.
Can somoene help me ?
I dont know if it is because i start aplying nutrients or the Lack of it. Or maybe the low amount of water.
Nutrients
Biobizz
Fishmix 1,5ml/l
Topmax 1,5ml/lLeaves. Edges burnt
Leaves. Color - Yellow
Leaves. Color - Dark-brown
3y ago
3
5