The Grow Awards 2026 🏆

Back to Grow Questions

Seeing some top bud leaf discoloration

aRecreationaliststarted grow question 6y ago

Starting to see small dark/black discolorations on the leaves. Since I don't know the genetics, I can't tell if it's prone to dark leaves. Could it be signs of anything else? Note: Started watering only using TopMax and ActiVera because of some possible Nitrogen toxicity

aRecreationalist

Solved

Leaves. Color - Dark-purple

Leaves. Color - Black or grey

likes

Shagrathanswered grow question 6y ago

Yes it could be genetics but it looks like molybdenum deficiency. It is often caused by low temps and excess sulphur. It should be nothing to worry about tho!

1 like

Complain

Selected By The Grower

Similar Grow Questions

Solved

Bud leaves turned black Top leaves turned brown overnight, That day I did come home to a disturbing temp off 31oC . It’s the black Mini leaves in buds that are worrying me more. lights came on accidentally for two hours so gave her 16hrs dark and back to 12/12 This may have contributed.

Leaves. Color - Black or grey

6y ago

1

Solved

Problema con mi Runtz Muffin Buenos días, Tengo un problema con mis hojas, (puse fotos para que podáis ver). He visto que podía ser un deficiente de fósforo. Pero también puede ser un problema de calcio y de magnesio. Alguno podría ayudarme con eso ? Que tengo que hacer ? Añadirle un PK 13-14 ?

Leaves. Curl up

Leaves. Color - Dark-purple

Feeding. Deficiences

5y ago

3

3

Solved

I don’t know what does it mean that I have blueish tint on my leaf’s If you know what is wrong with them tell me please.

Leaves. Color - Dark-purple

3y ago

1

4

Solved

First time grower in soil - Plant problem I am a first time grower in soil. This plant is an autoflower and is 25 days into flowering. Can someone please help diagnose this? All the leaves are starting to turn yellow as well.

Leaves. Color - Pale

Leaves. Color - Black or grey

3y ago

5

3

Solved

NPK Deficiency?Does this look like some kind of N, P, or K deficiency?

Leaves. Color - Yellow

Leaves. Color - Dark-purple

Feeding. Deficiences

5y ago

2

Solved

Royal Dwarf authomatic. Purple color What do you think is happening? It happened in 24/48 hours. This purple color looks nice but I don't think it's supposed to happen.

Leaves. Color - Dark-purple

5y ago

2

2

Solved

At what stage do leaves get darker ? This is confusing I overwatered them at the beginning of veg and then I fed them with 0.7 ec nutes max, EC would go up if I gave more. I've had tips burning probably from light too close. I find that leaves are pretty dark but it may be because of the strains. When leaves do get darker in flo ?

Leaves. Tips - Burnt

Leaves. Color - Black or grey

3y ago

3

4

Solved

Today I noticed 🍄mushrooms popping up with GiSCele. Does that matter? Are they🍄poisonous to girlies? Don’t bother me,but I dunno🤔. I recently started using 🦇 bat guano and have a feeling that’s what encouraged- kinda cool if I see Smurfette sunbathing on 👙🆒👍🏼

Leaves. Color - Black or grey

7y ago

1

2

Solved

Discoloration progressing from old fan to colas, is this a concern/requires action?I have some discoloration happening to OB5,more pics in week 6. Started first on few old fan leaves with yellow & brown/purple patches and now is occurring to the several of the colas and is spreading to more fan leaves. Water pH may have been in the 5-6 range last week. HlpPlz

Buds. Other

Leaves. Color - Dark-purple

6y ago

2

2

Solved

Deficiencia o exceso.A qué puede deberse el aspecto de esta hoja? Las hojas están sanas y no tienen manchas de otro tipo a parte de esa decoloración. A mi me parece deficiencia de magnesio pero no estoy seguro. Gracias.

Leaves. Color - Dark-purple

3y ago

4

6

Solved

Nocturnalgardener

Calcium Deff im just wondering if you think this is a calcium deff?

Leaves. Tips - Burnt

Leaves. Color - Black or grey

5y ago

2

1

Solved

Do those leaves look a little too dark green and slightly waxy? May have to lay off the nitrogen I think.

Leaves. Color - Dark-purple

7y ago

1

Solved

Black spots and light green leafs Anybody knows what the black spot in the new leaf grow in center is.never seen it before.also very light green leafs with 2.i use light mix and never had this issue before.use rain water.

Leaves. Color - Yellow

Leaves. Color - Black or grey

4y ago

3

4

Solved

Black spots?Is this a deficiency, nutrient burn, or disease, growing in MG soil, recovering from overwatering as well.

Leaves. Color - Dark-brown

Leaves. Color - Black or grey

5y ago

1

1

Solved

Leaf discoloration - light and dark splotches Hello! Any ideas as to why my leaves have splotches of discoloration? 😅 It appears that one leaf has light 💀 patches while the other leaf has dark. 👹 Thanks for your time! 🙌

Leaves. Color - Yellow

Leaves. Color - Black or grey

6y ago

2

3

Solved

Purple in week 1 Purple in week 1 ? This is normal ?

Leaves. Color - Dark-purple

5y ago

4

4

Solved

N tox in full swing. Lowered feeding from 1 Tsp to 3/4 Tsp Cal/Mag, and Grow/Micro from 1/2 Tsp each to 1/4 Tsp each. Hoping this helps correct. Is it possible that overwatering also contributed to excessive N uptake? I let the coco dry out a lot more (~4 days) this time.

Leaves. Color - Dark-purple

7y ago

1

1

Solved

🍁 changing color ??Help! 4 weeks of bloom, began this about 7 day ago… What is it, how we could greening it?

Leaves. Edges burnt

Leaves. Color - Yellow

Leaves. Color - Dark-purple

2y ago

1

1

Solved

Why don't the buds blow and the leaves are turning red?Why don't the buds blow and the leaves are turning red? How much longer should I wait? Thank you in advance.

Buds. Not fattening

Leaves. Color - Red or pink

Leaves. Color - Dark-purple

3y ago

1

2

Solved

Hallo, werden die Blätter der Pflanzen dunkler wenn man mehr Dünger gibt bevor dass sie überdüngung Erscheinungen haben? Ich nutze Canna aqua. Ich weiß dass wenn ich zu viel Stickstoff gebe dass die Pflanzen dunkler werden. Ist das aber auch so bei zu hohen EC?

Leaves. Color - Black or grey

5y ago

1

2