Vote Now 🏆 for the Grow Awards 2025!

Chat

By continuing to use the website or clicking Accept you consent to our cookies and personal data policy and confirm that you are at least 18 year old. For details please see Privacy Policy and Terms

Accept

Recommended

Grow QuestionsBurned upper leaf edges

Burned upper leaf edges

Cannapprenticestarted grow question 4 years ago

Hi! Dark spots appeared on some upper leaves overnight. I don't think this is the cause, but I did a pretty heavy defoliation the day before. the spots only affects leaf margins and makes the tips curl up. The spots are brown, burned and slightly purplish. what could this be?

Cannapprentice

Cannapprentice

Cannapprentice

Solved

Leaves. Color - Dark-brown

likes

blendmedmedmananswered grow question 4 years ago

your ph is off. to fix you need to do a flush flush until your run off is at a 6.0 let the pot dry out for a few days. mix your first feed of nutrients at half of what you use. get the ph where it needs to be things will be fine. if you can at the first feed try to add kelp. this helps with the stress your plant goes through. use every other feed. hope that helps

likes

Complain

Selected By The Grower

MangoDuduanswered grow question 4 years ago

U check ph and ec? They can be the problem of your plants, you can have a bad tap water that cause lockout

likes

Complain

Similar Grow Questions

Solved

Brown spots on some newer but not new I’m 6wks into gorilla cookies and some of the leaves have developed brown spots only on the ones close to the top of new growth

Leaves. Color - Dark-brown

a year ago

1

2

Solved

Help! What is this?! Upper leaves turning yellow/brown but not the lower ones. Light burn?

Leaves. Edges burnt

Leaves. Color - Yellow

Leaves. Color - Dark-brown

a year ago

1

1

Solved

Overfed P and K Unfortunately i have overfed PK as thought the bottle said 7ml per L but instead was 0.7ml. Noticed tips of leaves the next day browning so checked the feed chart again and pretty much shit myself. Flushed all 3 plants for about 5 mins and now they seem ok hopefully.

Leaves. Color - Dark-brown

a year ago

4

4

Solved

Amateur braucht Hilfe Meine Blue chees Auto geht es nicht so prima … Hat meiner Meinung nach Anzeichen von Adler Krallen und würzel Fäule ich brauchte Tipps Ist in einem 19 l Topf ich weis bischen Groß Hab Ton Stein ganz unten und dan Kokos mit all mix gemischt und oben in Kokos ein wachsen lassen

Leaves. Color - Dark-brown

Plant. Other

a year ago

1

2

Solved

Moin, bei meiner Größen Pflanze fangen die Blätter an von außen gelb zu werden und braune Punkte zu bekommen. Ist das ein Zeichen von einer überdüngerung? Alle anderen Pflanzen haben dies nicht. Oder zu wenig?

Leaves. Color - Yellow

Leaves. Color - Dark-brown

a year ago

2

2

Solved

Hi, last weeks my plants started to show symptoms of nitrogen deficiency. last 2 times i watered with 1,5x nutrient. Now they look like that, do you have any advice about the plants? -water 6.5 ph -120x120 tent, 240w QB Nutrients: t.a pro organics grow-bloom, aleo vera spray

Leaves. Color - Dark-brown

Feeding. Deficiences

a year ago

1

Solved

Nutrition or something else?Does anyone recognize this brownish leave/vein coloring? I have searched alot, but could not find anything that looks like this. It started in the veins a few days ago. But now it's spreading throughout the whole leave. Also the leaves are very pale. Hat some overwatering oopsi

Leaves. Color - Dark-brown

a year ago

2

Solved

TheNextGanjaMan

Pest attack. What can I use to eradicate?3 weeks of flowering, and the pests are still here. Can I play Beauveria Bassiana? Or just neem oil? - The temperatures were very high here, exceeding 30°C, this week it will decrease. - I have other plants to harvest and I'm going to take advantage and clean the grow. Help 😥

Leaves. Curl down

Leaves. Color - Dark-brown

Other. Bugs

a year ago

4

4

Solved

Phosphor mangel?Phosphor Mangel? Habe 2 Blätter die so

Leaves. Color - Dark-brown

Feeding. Deficiences

a year ago

1

1

Solved

1. Over Fed (seaweed?) 2. Burnt? Cauliflower.. 3. Calcium Deficiency 4. Hydrogen peroxide 12% Food-grade 30/70 Mix. Personally I think it's the hydrogen peroxide 12% mix, the hydrogen gave one of its atoms to the neuron of the Diatomaceous earth metal clay. With help from heat

Leaves. Tips - Burnt

Leaves. Curl up

Leaves. Color - Dark-brown

a year ago

8

8

Solved

Spots on leaves, brown shimmering.I've read that it's a boron deficiency, but I'd rather be sure.

Leaves. Color - Dark-brown

Leaves. Color - Mottling

a year ago

2

1

Solved

calcium deficiency one plant is showing signs. pic included. had a few nute feeds, recipe as follows (per 2 litre) 1ml bio-grow, top-max & bio-heaven 2ml bio-bloom 24/7 lights; biobizz allmix i treated with bug clear on leaves and added sticky yellow tape q: what dose of CalMag with above ?? ^

Leaves. Color - Dark-brown

Other. General questions

a year ago

4

3

Solved

Leaf Issue!Could someone help me understand whether there is a problem a deficit or an excess.

Leaves. Wilting

Leaves. Color - Dark-brown

Leaves. Other

a year ago

5

6

Solved

Black spots spreading // Need your help!Anyone got a clue what this dark spots could be? It started in a corner of the tent with 1 plant a few weeks ago and now it has spread to another. I suspect pH issues and a nutrient lockout bc of that. Not sure if its the same issue though..Could be an infection as well...

Leaves. Color - Dark-brown

Leaves. Color - Black or grey

a year ago

1

4

Solved

Leaf issue!Could someone help me understand whether there is a problem a deficit or an excess.

Leaves. Wilting

Leaves. Color - Dark-brown

Leaves. Other

a year ago

5

1

Solved

Calcium deficiency?Saw this little brown/yellow parts today. She is in BioBizz LightMix Soil and gets 0.3ml/L BioBizz CalMag 3x per week. pH is above 6.5 . Today I gave her 1ml/L CalMag. Was this the right choice? Is this a calcium deficiency?

Leaves. Color - Dark-brown

Feeding. Deficiences

a year ago

2

2

Solved

Brown patches on leaves, thought it was calcium deficiency symptoms.Having problems with brown patches, (see last 3 pics week 10), a quick google and I went with adding more CalMag but it's got worse the further into flowering I go, the farthest behind plant has least, furthest ahead is worst, any ideas?, many thanks in advance :)

Leaves. Color - Dark-brown

a year ago

4

4

Solved

Brownish Spots on 2 Older Leafs. Young plant.I searched it up before posting this and what I found is: Leaf spot, canker, and fungus: Brown leaf spot, Yellow leaf spot, Cladosporium stem canker and Chaetomium fungus. Solutions I found in the comments below. What do you guys think? Can it be heat (a lot of hot days here)?

Leaves. Color - Dark-brown

Other. General questions

a year ago

5

5

Solved

Hello friends, do you know what kind of issue could be these brown spots. It appeared one day ago. I grow in coco perlit with canna feed according feeding chart. Thank you for your advices..

Leaves. Color - Yellow

Leaves. Color - Dark-brown

a year ago

5

Solved

How's the quality?How would you rate the quality of these plants? The dark brown leaves have me self conscious of the roots situation. DIY supersoil mix recipe here: https://pastebin.com/pbxMZysq I've added more dolomite & guano as topdressing and fed liquid calmag and potassium during flowering.

Leaves. Color - Dark-brown

a year ago

5

4