The Grow Awards 2025 🏆 
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
Burning leaves nutrients problem or light stress?
Techiistarted grow question 6 months ago
Burning leaves nutrients problem or light stress?
Solved
Leaves. Edges burnt
likes
Leromeanswered grow question 6 months ago
Just saw in your diary that this problem existed for longer, you are feeding frequently and you mentioned possible overfeeding at one point.
Maybe your potassium intake is being "blocked" from too high amounts of N / P / Ca &/or Mg.
In this case you could consider to try flushing your soil if possible to remove built up salts.
Leromeanswered grow question 6 months ago
Looks like a potassium deficiency to me. Flowering plants have a higher demand for K than vegetative plants.
1 like
Complain
Similar Grow Questions
Solved
Cannanna
Was ist los ? Magnesium mangel oder Stickstoff..HilfeHey Leute,
Ich weiß nicht was los ist. Meine Damen sind irgendwie traurig. Vor 14 Tagen wurden sie umgetopft und haben jetzt 2 Mal Dünger erhalten. Davor 10 Tage lang ph eingestelltes Wasser. Dünger ist Canna Terra und gegeben wird 3 ml auf einen Liter Wasser plus CalMag.Leaves. Edges burnt
Leaves. Tips - Burnt
2 months ago
1
2
Solved
encrypted33
Leaf burnsI have the following problem with my ladies, they are in Vegi 2 and now the lower leaves are getting burnt tips. I use Biocanna Bio Terra Plus soil and Biocanna Bio fertilizer according to the FastBuds autoflower schedule. What could be the problem ?Leaves. Edges burnt
Leaves. Tips - Burnt
2 months ago
2
6
Solved
FeebleSnane
Strange Twisting LeavesI have a plant that's just over 3 weeks old, and since the first week or so, I noticed it has some leaves that grow with a "kink" or "twist." They all seem to have a small discolored spot on the edge of the leaf that eventually becomes the corner of the kink/twistLeaves. Edges burnt
Leaves. Twisted
Leaves. Other
2 months ago
7
Solved
Spike_KCanG
A deficiency, a toxicity and a toxic-deficiency???Here's what I make of it (and PLEASE correct me where I am wrong!) :
The tips yellowing indicates, a nitrogen burn.
The burnt brown tip indicates, nitrogen burned to long 😂
The black spots indicate, a P or K issue (as the leaves are otherwise healthy green in color)2 months ago
4
4
Solved
mtd_3
Big deal?
Feeding 2L every 2nd day with tab water and around 10ml total bloom fertilizerWeek 8
Leaves. Edges burnt
2 months ago
4
4
Solved
Cannaisseur90
Cant figure this outAny input on this issue?!?! Can't figure out problem i keep facing. Starts in flower around week two. Auto in soil only fed once and added fox cal mag a few times.Leaves. Edges burnt
Leaves. Color - Yellow
Leaves. Color - Mottling
a month ago
12
11
Solved
FeebleSnane
Yellow leaf edgesI have a couple plants that are about 5 weeks old, and one has started getting yellow edges around the leaves. I feed them with worm tea, kelp, and calmag every other week, but it's a light dose so I think this is a deficiency and not a toxicity.Leaves. Edges burnt
Leaves. Tips - Burnt
Leaves. Color - Yellow
2 months ago
1
1
Solved
XaXaXa
Brown spots on my little seedlingsHi, anybody can confirm my thought process? Ph of runoff is 6,5 all the time
I know I did more nutriens 4 days ago and overwater, I lower light power as well right now on 375PPFD ,they geting only water now Can you confirm that this was due to too much nutriens and overwaterinng?Leaves. Edges burnt
2 months ago
1
1
Solved
tangie
Yellow & brown spots in 2nd and 3rd week in coco-perlite nursery cup. What am I doing wrong? Fed until 20% runoff (extra), strained. Smth with roots?2nd grow in 70/30 coco-perlite mix* & very similar issues w. yellow/brown spots in weeks 2-3, then stabilizes.
*CalMag & pH buffered 6h @ 0.5mS, pH5.8, strained** & seed planted.
Feed:
W1: **Strained sol. + water 70/30, pH5.8
W2: AN M+G+B 1-1-1 + Simplex CalMag Plus 0.4mS
Help3 months ago
9
6
Solved
Max_Dune
Week 8 - Godzilla Cookies Auto - Feels like they are substantially behind. Thoughts on pest management or feeding schedule tweaks?Day 54 - Godzilla Cookies Auto. Dealing with whiteflies, soil gnats & a caterpillar (now removed). Currently using neem oil spray & adjusted watering. Plants are full sun/30% shade daily. Avr Temp 20°, Avr Hum 56%
How do these look? Are we good, or 'newbie' grow OCD?Leaves. Edges burnt
Leaves. Tips - Burnt
Plant. Spaces between nodes
4 months ago
6
6
Solved
jeannoTapin
Brown/burnt spots on 1 plant onlyHello,
D49 (out of 70 theoritically) same strain, same nutes but only one plant looks affected (top right). Looks like it started 2 or 3 days ago.
Could it be nute burns ou some kind of lockout?
If yes should I flush or could i only give tap water for a few waterings?3 months ago
5
4
Solved
Seksix
Hi growmies i would apreciate it ur opinionGood day guys i have a question about my plants, my question is why my stem turn allmost black but plant doesent show any problem with it , is it genetics or my fault something ? And how they look (ur opinion) i want soon to cut them and to put new ones in bigger pots.Leaves. Edges burnt
Leaves. Color - Yellow
Leaves. Color - Red or pink
3 months ago
2
3
Solved
dabestgrowing420
What deficiencyWhat that could be?Leaves. Edges burnt
Leaves. Tips - Burnt
Leaves. Color - Yellow
4 months ago
1
Solved
mustainblood369
what type if tea should i use to help from yellowing and i gave them each 2 tbsp bone meal 1 tbsp coffee when they start flowering?Buds. Not fattening
Leaves. Too few
Leaves. Edges burnt
4 months ago
1
Solved
Jose671
What could this be?High fam. New grower here and wanted to know what this means and how can I fix it/prevent it. Take a look at the leaves start forming brown spots. I only see it in a couple of leaves and slight browning at the tips. Please help. Thank you. Many mote questions to come.Leaves. Edges burnt
Leaves. Tips - Burnt
4 months ago
4
Solved
ClassicKellerWiese
Überdüngung oder Mangel ?Bei all meinen Pflanzen bilden sich gelbe Blattspitzen aus die auch etwas verbrannt aussehen.
Denke nicht das an der Lampe liegt, die ist 70cm entfernt und läuft auf 50%.
Wachsen auf Kokus und Lightmix Erde von Biobizz.
Gedüngt wird mit Biobizz nach Düngechema.Week 8
Leaves. Edges burnt
4 months ago
2
2
Solved
dabestgrowing420
Brown spots on leavesHi, some white widow auto leaves have these brown spots and some burned edges and tips. What deficiency or toxicity is this? Growing organic, using biobizz nutes.Leaves. Edges burnt
Leaves. Color - Dark-brown
5 months ago
1
Solved
Chubaka26
Help please!What is happening with her?Leaves. Edges burnt
Leaves. Tips - Burnt
Leaves. Color - Yellow
4 months ago
2
2