The Grow Awards 2026 🏆

Back to Grow Questions

Leaves have turned rusty

shutupstevenstarted grow question 4y ago

Any ideas why is wrong with my Northern Lights Auto?

shutupsteven

Open

Leaves. Color - Dark-brown

likes

Answer

Robertsanswered grow question 4y ago

Guessing your ph was out of range and you suffered multiple deficiency signs

likes

Complain

Similar Grow Questions

Solved

What am I looking at?Redish Brown spots, and slight discoloration. Magnesium deficiency? Calcium? Other? Gave them a splash of Calmag, but was it even necessary? OR, should I have just swapped nutes and wait, then correct if not improved? (It was nute day, that's why I ask!)

Leaves. Color - Dark-brown

5y ago

2

2

Solved

Hello guys, what kind of problem could this planta have? These are autoflowering plants.

Leaves. Tips - Burnt

Leaves. Color - Dark-brown

2y ago

1

1

Solved

Brown spot What can cause this? Too much light?

Leaves. Color - Dark-brown

5y ago

3

Solved

Deficit Han comenzado a salir unas pequeñas manchas en las hojas de abajo de una de las plantas y no encuentro de que puede ser, alguien sabe? Gracias

Leaves. Edges burnt

Leaves. Color - Dark-brown

4y ago

2

1

Solved

What is this deficiency?They started off with some brown spots and progressed. Is this phosphorus? I have been feeding with .5-1ml of dyna grow bloom and 2ml of cal mag per gallon watering at about 6.3-4 ph. But i recalibrated my ph pen and did one water since.

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5y ago

4

4

Solved

PH problems?Hey growers! These purple haze is in their 2nd week of flower. Only one of the two phenos are showing these symptoms. What might have caused this?

Leaves. Color - Yellow

Leaves. Color - Dark-brown

4y ago

2

Solved

AUTOASSASSIN215

Heat stress or Root rot ??Hey my 7 month old plant not doing too good the leaves are turning brown and crispy Might be heat but then again Might be bud rot and it’s spreading like wild fire also i notice not a lot of flowering growth idk weather to chop it down or keep fighting

Leaves. Tips - Die

Leaves. Color - Yellow

Leaves. Color - Dark-brown

4y ago

2

Solved

Carencia de Mg Hojas en forma de bandera con manchas amarillas, sin dudas carencia de Mg, el problema es que no se que lo provoca, haré un estudio de acidez al suelo para estar seguro, pero dejo el hilo abierto a cultivadores más experimentados por si me podrían dar una mano con esto

Leaves. Color - Dark-brown

4y ago

4

5

Solved

Brown spots on tips of some leaves 4 leaves affected on only one plant. All plants are receiving same feeding and are from same clones. Based on photo and googling it looks awfully lot like P deficiency? I'm still in vegetation phase though. I'm feeding with Advanced Hydroponics Grow + Bloom + Micro based on chart

Leaves. Color - Dark-brown

5y ago

2

Solved

Weird leaves .. defiency??Hi All. These are autos in late flower. I know there's not much I can do but ride it out Just curious to know what the problem is. Or defiency? 💚

Leaves. Color - Dark-purple

Leaves. Color - Dark-brown

Feeding. Deficiences

4y ago

1

1

Solved

Phosphorus deficiency?Wondering if this is a phosphorus deficiency... i dont think it looks like cal mag. Any thoughts

Leaves. Color - Dark-brown

5y ago

1

Solved

Calcium deficiency?Hello Everyone. The Fan leaves at the top and Middle have brown spots, I use RO water and feed with Fox Farm Tiger Bloom..Everytime I feed or Water I have been adding 5 ml of Cal Mag Ph 6.4 feeds right at 900ppm . NL auto week 4 flower. Thanks in advance. Wash your hands 👍

Leaves. Color - Yellow

Leaves. Color - Dark-brown

6y ago

1

1

Solved

Is this more nutrient deficiency?I believe the yellowing and brown spots came from the roots starting to suck up more water than the previous weeks. Do you agree that the Durban Poison had some nutrient deficiencies?

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5y ago

1

1

Solved

Bottom leaves issue Can someone tell me what is causing this issue and how should I fix it ? Should I just remove the “infected” leaves?

Leaves. Color - Dark-brown

Leaves. Other

3y ago

1

2

Solved

Dark dots in leaves. Lamp burns?I saw this dark dots in leaves but only she has it. She was exactly under spider-farmer sf1000 at 30 cm. Now I moved to other softer light at 40 cm. What do you think? Lamp burns? They're dry and curl up. Some images are edited for better appreciation but you have also originals.

Leaves. Curl up

Leaves. Color - Dark-brown

Leaves. Color - Mottling

4y ago

4

3

Solved

My leafs turn yellow very fast sometimes with dark almost black spots on them is that normal? And what can i do about it?

Leaves. Color - Dark-brown

8y ago

3

3

Solved

Vein brown Is this from dry root spots in a fabric pot? Only on 1 leaf so far, veins are turning brown.

Leaves. Color - Dark-brown

5y ago

1

1

Solved

Heeelp!!!Do anyone know what’s going on with my plant? The leaves are going from green/yellow to brown, the edges are dry and crisp but flowers are fine at this moment.

Leaves. Color - Dark-brown

4y ago

5

3

Solved

Plant dieing why I don't no what's going on... I tried flushing... Push the lights back further.... And gave them cal mag nothing fix the problem... Any suggestions

Leaves. Color - Yellow

Leaves. Color - Dark-brown

Plant. Wilting

6y ago

2

2

Solved

More leaves turn yellow from the bottom upwards with brown spots in the middle of the leaf. ph 6.2 goes in but runout is 7.4 what is wrong? lockout or overfertilised? I used BioBizz schedule. Will it flower someday or should I trash it? 😭

Leaves. Color - Dark-brown

6y ago

16

6