The Grow Awards 2026 🏆

Back to Grow Questions

Root rot?

WeGrowstarted grow question 4y ago

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.

WeGrow

WeGrow

Open

Leaves. Color - Dark-brown

likes

Answer

Robertsanswered grow question 4y ago

Looks like phosphorus deficiency

1 like

Complain

Wrongholn519answered grow question 4y ago

I've got the same issue and I think it's damage caused by fungus gnats. They got out of control with my latest grow and my work schedule.. it's left a few brown spots on some of my leaves. I've eliminated so many other possible causes. It's either from the fungus gnats I had or its possibly a calcium deficiency but I don't think it's calcium.

1 like

Complain

Similar Grow Questions

Solved

Few brown spots on leaves Brown spots on photo Bruce Banners big leaves. Do not see any on new growth

Leaves. Color - Dark-brown

4y ago

1

3

Solved

I water with 50% distilled and 50% rain OR 50% distilled and 50% tap. I have fed once with Grow Big and it happened right after. Might have rubbed nozzle on the underside of the leaves. I water every 2-3 days and water until drop of runoff appears in tray. How much runoff?

Leaves. Color - Dark-brown

5y ago

6

5

Solved

Maui Waui CA deficiency?Can anyone confirm or guess at the kind of deficiency my plant is having? I am not sure if "hard water" (instead of RO so far) is the right answer or if I need some special sauce... Thank you! Details here: https://growdiaries.com/diaries/139533-grow-journal-by-fejg87fb2skvf

Leaves. Color - Dark-brown

4y ago

2

3

Solved

Pls help Is IT magnesium deficiency again?

Leaves. Edges burnt

Leaves. Color - Dark-brown

3y ago

1

1

Solved

Whats wrong???What's wrong???

Leaves. Curl up

Leaves. Color - Dark-brown

Plant. Other

5y ago

3

Solved

What kind of deficiency is this or is it light burn? Can provide more pictures since they are in a sleep period now. It’s this plant, strawberry banana one and the purple queen.

Leaves. Color - Dark-brown

7y ago

4

4

Solved

NarcissisticEcho

Copper color leaves Copper color leaves. Also looks kinda dead. What can it be?

Leaves. Color - Dark-brown

4y ago

1

Solved

Brown patches Brown patches starting to appear on older fan leaves only. Calmag?

Leaves. Color - Dark-brown

4y ago

3

3

Solved

TripleCcannabis

deficiency?Is this a boron deficiency. If not whats going on with this girl

Leaves. Color - Dark-brown

Feeding. Deficiences

5y ago

2

Solved

Unknown rust on 7th flowering week This started as what I thought was a cal/mag deficiency, bought some, gave it for a week at a good dose and 6.3ph, and this intensified and switched from just lower leaves to the upper and a few sugar leaves on one plant. Any ideas? May calmag takes awhile? Or wrong diagnosis?

Leaves. Color - Dark-brown

Feeding. Deficiences

6y ago

1

3

Solved

3 identical plants, 3 separate issues... Help?3 girls, same strain, same schedules, same nutes. No Pests. All have different issues. 1 = yellowing/brown spots, low terpene but good bud growth, 2 = Low terpene production, 3 = Skinny buds, normal terps Any ideas what could be causing them?

Leaves. Tips - Die

Leaves. Dropping off

Leaves. Color - Dark-brown

4y ago

3

5

Solved

Hello everyone, sorry to disturb but can anyone please help me identify what's wrong with my plants. I've included pictures, and if you need anymore details I am more than willing to share.

Leaves. Edges burnt

Leaves. Dropping off

Leaves. Color - Dark-brown

2y ago

3

5

Solved

lovely_neighbours

Crispy brown leaves northern light is showing yellow and brown leaves at the top and the bottom of the plant. These leaves are thin and crispy like if they are about to fall off. I am watering it 2 to 3 times per week and started adding a bit of cal mag last week when they started showing brown dots

Leaves. Color - Dark-brown

4y ago

8

6

Solved

Cannabis leaf symtomp Need help Day42 what wrong with this plant

Leaves. Color - Dark-brown

5y ago

4

Solved

Hello friends, do you know what kind of issue could be these brown spots. It appeared one day ago. I grow in coco perlit with canna feed according feeding chart. Thank you for your advices..

Leaves. Color - Yellow

Leaves. Color - Dark-brown

2y ago

5

Solved

Thankfully not my plant but what do you think this deficiency is? My first thought was actually that one plant fungus r something that causes brown circle like spots. This is the top of the plant. No curling to leaves.

Leaves. Color - Dark-brown

4y ago

2

Solved

Plant seems to be slowly dying My plant started to go backwards and I can’t get it revived, anyone has any idea what it could be?

Leaves. Color - Dark-brown

5y ago

2

2

Solved

N or P deficiency?Need help to understand if this is P or N deficiency. It's on the lowest fan leaves, one is more pronounced than the other, and it's mostly on one side. Stems and veins look like they're giving hints of P def but from what I searched leaves look like it could be N def.

Leaves. Color - Dark-purple

Leaves. Color - Dark-brown

2y ago

3

3

Solved

evil eye. never see this before, google yields nothing week 4 flowering, vpd fert airflow temp all good, got this eyed marks on my leaves and no info on internet. looks like P def but why spots…

Leaves. Color - Dark-brown

1y ago

1

4

Solved

Leaf issues Looking at the leaves, what you think is the issue with this plant? every single morning i have couple of totally yellow leaves at the bottom, edges are getting dark green and then dry. I flushed the plant but didnt see any improvement. I have 2 more plants that are doing great.

Leaves. Curl down

Leaves. Color - Dark-brown

6y ago

2

2