The Grow Awards 2026 🏆

Back to Grow Questions

What is this rust brownish color on the leafs. It&...

VictoriaKing82started grow question 5y ago

What is this rust brownish color on the leafs. It's only on a couple tops out of 8

VictoriaKing82

VictoriaKing82

VictoriaKing82

VictoriaKing82

Open

Leaves. Color - Dark-brown

likes

Answer

CraftbyKeMoanswered grow question 5y ago

That is a calcium supplement issue normally. Especially when into flower the plant uses it all up and its stored in the leafs . Just add abit cal/mag to your feeding

likes

Complain

Captchilluminatianswered grow question 5y ago

Whats your Relative humidity reading and what nutrients are you feeding? ..if any

likes

Complain

Similar Grow Questions

Solved

To live starting to turn brown and light color Can someone tell me what is wrong With this gorilla cookies are

Leaves. Color - Dark-brown

5y ago

1

2

Solved

Calcium or roots trouble?Hello happy grower, New week and new trouble but on the second plant. Those brown dots appear today. Is it a cal/mag defficiency or roots trouble? I will check roots tonight. Thank you forward for your advise!

Leaves. Color - Yellow

Leaves. Color - Dark-brown

Feeding. Deficiences

3y ago

10

11

Solved

Discoloration and Spots I'm still not sure if this is a deficiency or some sort of burn. It's definitely spreading a bit more, and I'm unsure if there's time left to address it in the grow. Video of full plant in week.

Leaves. Edges burnt

Leaves. Color - Dark-purple

Leaves. Color - Dark-brown

5y ago

2

2

Solved

pH DWC grow. 1. pH dropping 6 to 5.3 in a day, changed new nutes still happening 700ppm/ec 1.4 staying same no change. 2. Roots doesn't stink or smell, my roots has always look like that using biodiesel and seaweed 3. Distinct brown spot on leaves Please advise.

Leaves. Color - Dark-brown

Roots. Color - Brown

Feeding. Other

5y ago

5

3

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

Cosa fare?Perche alcune foglie hanno questo aspetto? Hanno 16 giorni di fioritura .qualcuno sa dirmi cosa succede ?

Leaves. Color - Dark-brown

Leaves. Other

5y ago

4

4

Solved

TripleCcannabis

Havent found any help for the issue my little girls having.. browning and drooping. Leaves are still ridged but curling up. My heat was a bit high but iv fixed that. So now @ 24C and 65 RH 24hr lights. No nutrients yet but have a very dilute 1:1:1 of the GH trio mixture.. no help

Leaves. Curl down

Leaves. Color - Dark-brown

5y ago

3

Solved

Brown spots on yellowing leaves close to Flush and Harvest I'm at day 69 of my grow. The plant has been getting frostier and frostier, the leaves are starting to yellow, and I'm seeing the first signs of amber trichromes. Today I noticed the leaves are starting to get some brown spots. Should I be concerned so close to final flush?

Leaves. Color - Dark-brown

4y ago

1

2

Solved

Foglie Ho un problema alle foglie sapete cosa sia? Ho provato ad alzare i led a 50cm per vedere se sia quello il problema. Voi cosa dite?

Leaves. Edges burnt

Leaves. Color - Dark-brown

5y ago

2

3

Solved

Some pistols turning brown. It's the 4th week, seems a bit early to me. Some idea?

Leaves. Color - Dark-brown

6y ago

10

4

Solved

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.

Leaves. Color - Red or pink

Leaves. Color - Dark-brown

Leaves. Color - Mottling

5y ago

3

Solved

Well I'm in early flower at this point leaves still abit yellow should I up my feeding at this point as I'm at 739 ppms and when should I start my bloom nutes

Leaves. Color - Dark-brown

7y ago

1

1

Solved

Ayahuasca leaves are turning brown in an rust color . Most of the plants are healthy but some of them are starting to curl and get this brown color. Can anyone help me what is going on . ( im using 600w lumii lights ) would appriciate it if anyone gives me a hint 💚

Leaves. Edges burnt

Leaves. Color - Dark-brown

4y ago

2

2

Solved

Brown yellow spots Yellow spots on leafs and crispy ones as well. Added calmag I think it heat related. In continued storie from last week.

Leaves. Color - Dark-brown

5y ago

2

Solved

forgettenseedling

Leaves getting brown, can someone help me out? What does the plant need?

Leaves. Color - Dark-brown

Feeding. Deficiences

4y ago

1

1

Solved

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

Leaves. Curl up

Leaves. Color - Dark-brown

Plant. Other

5y ago

3

Solved

Late Flowering Stage Deficiency or Nutrient Burn I'm not sure if this is nutrient burn or some sort of deficiency. Burnt tips were from possible previous nutrient burn, but now I'm seeing Brown spots and some discoloration. Please check my week to see full details.

Leaves. Edges burnt

Leaves. Color - Dark-brown

5y ago

3

3

Solved

SmallTownGrower

Might this be a Calcium deficiency I'm having?

Leaves. Color - Dark-brown

6y ago

5

4

Solved

P deficiency canna coco My Coco runoff Is coming Always less at every runoff.The EC just goes lower by Little step,like 40 us/cm,like 0,4 EC less each runoff and I am experiencing P deficiencies in lower leaves.Why? If I put more volume of fertigations It slowly ramp up though.

Leaves. Color - Dark-brown

4y ago

1

1

Solved

Why did it become like this?in the first week these brown spots appeared ... Can anyone help me understand why only this plant of 4 ended up like this?

Leaves. Color - Dark-brown

6mo ago

2

2