The Grow Awards 2026 🏆

Back to Grow Questions

leaf discolouration

GreenBeanstarted grow question 6y ago

edges of leaves are a blackish tint

Solved

Leaves. Edges burnt

Leaves. Color - Black or grey

likes

MovingOnanswered grow question 6y ago

Looks like you are seeing the "fall colors" that leaves start showing later on in flowering. It is normal, and sometimes leaves get very colorful when temperatures are low at night. Some strains and phenos change more than others, some don't change at all, and some change even when the temps at night aren't low.

likes

Complain

Selected By The Grower

Similar Grow Questions

Solved

Shockolateman08

Slight super high heat for a minute...Okay...so I was a little "malfunctioned"...I put a heater in to bring up the heat...it was 67. Well I brought it up all right, it was at full blast high for about a minute...right in front of this poor thing....what do?

Leaves. Edges burnt

Leaves. Tips - Burnt

Setup. Other

6y ago

2

3

Solved

Thoughts?Can someone confirm the brown spots are a calcium issue, What are your thought on the brown tips?

Leaves. Edges burnt

Leaves. Color - Dark-brown

5y ago

2

Solved

Weird leaves stains What is this? Leaves got brown but they aren't dry, idk why.

Leaves. Edges burnt

Leaves. Other

6y ago

2

Solved

Is my plant giving a warning I'm not sure if I have a problem or it's normal. Some tips show damage I think it was the light to close so I moved it back over 12 inches away. I am giving the bloom every other day but half of the water i give. No nitrogen is being given,hardly any ever she doesn't like it.

Leaves. Edges burnt

6y ago

3

2

Solved

Saw a lot of yellowing in the flowers, not sure if its enough or too much nutrients, or not enough water or its a pest. I was suggested neem oil to get rid of the pest creating those white spots, any other suggestions about how to get her to look healthier and growing faster?

Leaves. Edges burnt

7y ago

3

3

Solved

So our upper leaves have been developing some burn along their edges but are now yellowing too. I've increased the gap from light-plant to 75cm but is there more to it? Unlikely a deficiency as she's fed 1/4-1/2 recom. nutes every water. Root ph is ok so maybe nute lockout? Chur.

Leaves. Edges burnt

6y ago

2

2

Solved

Was it to much?My plant looked okayish then i transplanted and topped the same day and this happend ( i think I was feeding too much calmag ) Changed the res now running at a ppm of 750 ph 5.8ish RO water on autopots ( oh and my cat ate the tips from 3 leafs X( ...) Last pic is today

Leaves. Edges burnt

Leaves. Veins - yellow between

2y ago

3

3

Solved

Black tips One more. What's up here? Its happening to 2 plants but I've no idea why. No changes no stresses.looks like a nutrient problem. But if it is what is it and how do I fix it? I dont usually feed but if it will help ill get something.

Leaves. Color - Black or grey

5y ago

1

1

Solved

I probably have spider mites on my plant. Yesterday I sprayed it with Maag oil. Today I bought an organic product and sprayed it on the plant. Are the discolourations on the plant caused by the mites or burns due to increased light from the drops? Or a lack of nutrients?

Leaves. Edges burnt

Leaves. Curl up

Leaves. Curl down

8mo ago

1

Solved

Big deal? Feeding 2L every 2nd day with tab water and around 10ml total bloom fertilizer

Leaves. Edges burnt

1y ago

4

4

Solved

Plants seem to be dying after repotting Repotted all of my plants and they are very droopy and leaves are dry. I thought they were originally over watered but now I am not sure. They all seem to be dying. Any and all help is appreciated.

Leaves. Edges burnt

Leaves. Color - Yellow

4y ago

2

2

Solved

Yellowing to slight grey leaves What's the cause of the older yellowing leaves with some grey and the slow spread to the newer growth? I'm between pH problems and or deficiency but not too sure.

Leaves. Color - Yellow

Leaves. Color - Black or grey

5y ago

3

3

Solved

What could be happen to plant C?

Leaves. Edges burnt

Leaves. Color - Pale

Leaves. Color - Dark-brown

6y ago

1

3

Solved

deficiency Any clue on what the brown crispy leaves are?

Leaves. Edges burnt

6y ago

2

2

Solved

Still cant figure out what's going on with this plant. EC was over 2 for a couple of days but has since been taken care of, last reading was .83.Is this a deficiency or some other kind of issue? Some have suggested a p or k deficiency, but I feed Jack's 20-10-20 peat-lite so I would be very surprised if it was a P problem, and the problem seems to be all over the leaves, but a lot of them start from the base of the leaf.

Leaves. Color - Black or grey

Other. Mold

6y ago

3

Solved

I think I have issues I think I have issues. This is my first run on coco, a lot doubts. Can anyone help me?

Leaves. Edges burnt

5y ago

1

1

Solved

Showing a Deficiency Showing a deficiency, not sure what it may be…

Leaves. Edges burnt

2y ago

2

2

Solved

Looking at pic of day 70, can it be light burn?

Leaves. Edges burnt

7y ago

1

1

Solved

Darkening and curling of fan leaves What is causing darkening and downwards curling of the fan leaves? Started a few days ago, concerned if I don't fix it now it will spread and stunt my plant

Leaves. Curl down

Leaves. Color - Black or grey

Setup. Strain - Autoflowering

5y ago

1

Solved

Leaf problem?My leaves have stripes between light green and dark green. Is there anything wrong?

Leaves. Edges burnt

Leaves. Curl up

Leaves. Color - Dark-brown

5y ago

1

1