The Grow Awards 2026 🏆

Back to Grow Questions

Spots on leaves

Maggie_de_Blockstarted grow question 5y ago

Anyone know what's causing this? Slight discoloration and rust spots, mainly on older leaves. It's not that bad but quite spread out. did spray with neem oil recently, so is it just burn spots or a nutrient problem?

Maggie_de_Block

Maggie_de_Block

Maggie_de_Block

Solved

Leaves. Color - Dark-brown

likes

Hashyanswered grow question 5y ago

I there iv not used your range of nutrient for a while, have you got the right ratios of nitrogen phosphorus potassium Calcium and magnesium. Check out a feed schedule for your product and make sure your giving enough Calcium ànd magnesium. If a max dose is 2ml/L you shouldn't need to go above that.

likes

Complain

Selected By The Grower

Hempy_The_Kidanswered grow question 5y ago

Looks like a calcium deficiency

likes

Complain

Similar Grow Questions

Solved

Hello growers, this morning i found brown spots on fan leaves, is this some kind of deficiency or fungi? is harder to see under normal light but i can't take a decent picture in the grow box.

Leaves. Color - Dark-brown

5y ago

3

4

Solved

Spots on leaves Hi mates, what do you think about those points.we are at 4 week flowering, soil and canna Flores. Are they insects bite or some nutrients issue? Thanks in advance

Leaves. Color - Dark-brown

Leaves. Color - Mottling

Feeding. Deficiences

5y ago

1

1

Solved

Dark green leaves in meringue Is my girl telling me that the flowering fertilizer is too nitrogen loaded? I´m using top bloom from top crop, feeding at 1.4-1.6 Ec, and since last week I started to follow the feed-water-water schedule. The NPK of this fertilizer is 4-8-8. Should I adjust the input EC?

Leaves. Color - Dark-brown

Feeding. Schedule

6y ago

2

2

Solved

Discoloration of leaves Wanted to get an opinion on why the end of the leaves are discoloring

Leaves. Tips - Die

Leaves. White powder

Leaves. Color - Dark-brown

3y ago

1

2

Solved

Could anyone help me fix this I've been feeding at 6.4 3ml per l grow 1.5 ml per l cal mag iand just 1 ml per l bloom as I was going to flower in the coming week

Leaves. Color - Yellow

Leaves. Color - Dark-brown

5y ago

4

2

Solved

Whats wrong with her?I cant tell what's wrong with her. I recently upped my CalMag nutrients cause I originally thought this was a Calcium deficiency (full nutrient breakdown in diary). I dont want to hinder my harvest so any insight?

Leaves. Color - Dark-brown

Feeding. Deficiences

5y ago

2

2

Solved

rusty spots what are these rusty spots? it is getting worse then a few days ago. week 4 of flowering

Leaves. Color - Dark-brown

5y ago

1

1

Solved

J1 older fam leaves getting brown spots and yellow dried up tips. Rest of the plants look fine. See pictures above. I know it’s hard to see so I will try and get better pics later.

Leaves. Color - Dark-brown

8y ago

3

2

Solved

SLuGGeRNauT_420

Wtf Wtf is this just switched to remo nutes not overwatering only feed every 2 or 3 days when the medium is not damp

Leaves. Curl down

Leaves. Twisted

Leaves. Color - Dark-brown

4y ago

1

3

Solved

Puffdamagikchillum

OUCH!! What is it?Deficiency or toxicity? This is in ffhf/coco/Perlite/ewc ph'd @ 6.5 ff nute trio +Calimagic. feed and water once a week in 5gal pot led 14" above plant. My diary tells the rest. 1/4tsp Calimagic 1/2tsp of trio 2lts water.

Leaves. Color - Dark-brown

6y ago

1

1

Solved

Still Can somebody help me, kind of weird the rust still spreading on that plant but not on other, I was wondering if it's not simply a defo

Leaves. Color - Dark-brown

5y ago

1

2

Solved

Brown spot Color has changed of the brown spot

Leaves. Color - Dark-brown

Plant. Stem - Red or purple

6y ago

2

Solved

Leaves have brown spots Any idea what these brown spots could be?

Leaves. Color - Dark-brown

4y ago

1

6

Solved

Brown dark spots on fan leaf Any clue what this is? It only appeared on 1 of the plants and only on 1 of the fan leaves. The brown color has kind of a metallic shine to it. My guess is that it’s a Cal. def. I also suspect it might be a Phosphorus def. as the plants turned dark green the last few days.

Leaves. Color - Dark-brown

6y ago

2

2

Solved

Why do the leaves of my plants have brown spots?Why do the leaves of my plants have brown spots? I have control over all cultivation parameters except for humidity, which has been difficult for me to control and is currently high. What do you think?

Leaves. Color - Dark-brown

3y ago

1

4

Solved

Skittles plant with brown spots One of my skittles plants is starting to get these brown spots with a yellow outline. Any advise is appreciated!

Leaves. Color - Yellow

Leaves. Color - Dark-brown

3y ago

1

4

Solved

deficiencies? mag/cal, N, P?All the leaves from bottom to top are turning yellow... some of them have brown spots. mid-late stage def? Magnesium/calcium deficiency, nitrogen, manganese and phosphorus deficiency? Flushed all of them 1-2 weeks ago because of ph fluctuations Opinions?

Leaves. Color - Yellow

Leaves. Color - Dark-brown

4y ago

6

6

Solved

No logro descifrar cómo arreglarlo - auto en DWC 4 semana y media desde el comienzo, ph 6.0, ppm 600, incluye nutrientes base+calmag+silicium+trichodermas. mismo problema durante toda la vegetación, en la 4ta semana incluí calmag y mas fertilizantes y pareció mejorar pero ahora vuelve a decaer. Sobre fertilización? deficiencia?

Leaves. Color - Dark-brown

4y ago

1

1

Solved

Seedling 1st leaves curling inwards what might be a cause for the leaves curling in and looking a bit scorched. could it be that it wasn't getting enough water at the root?

Leaves. Edges burnt

Leaves. Twisted

Leaves. Color - Dark-brown

5y ago

3

4

Solved

Bronze spots What could be this spots? Found 4.

Leaves. Color - Dark-brown

3y ago

18

8