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

Back to Grow Questions

Potassium deficiency?

SmokeBigBudsstarted grow question 3 years ago

Possible potassium deficiency? I usually get burnt tips but these are starting to yellow down the sides too.

SmokeBigBuds

SmokeBigBuds

SmokeBigBuds

SmokeBigBuds

Solved

Leaves. Tips - Burnt

Leaves. Color - Yellow

likes

PEACEMAKERanswered grow question 3 years ago

She's beautiful looking like a lil calcium Deficiency that's all but she's beautiful 😍, good luck 👍

1 like

Complain

Selected By The Grower

ChitownCannaChicaanswered grow question 3 years ago

Looks like nutrient burn

1 like

Complain

Disn00fanswered grow question 3 years ago

Looks like it needs a little more K. Looking good.

1 like

Complain

Similar Grow Questions

Solved

Yellow spots on some leaves I need some help guys to understand what is this? My plant leaves seem to be showing since today some yellow spots which I believe is an early cal mag defficiency sign (as I use tap water which is kind of soft apparently). Any help? Thanks in advance, my furst grow.

Leaves. Color - Yellow

12 days ago

11

4

Solved

Beginner Grow – Still Getting Leggy Seedlings? please don't judge. the other plants are for using the electricity more efficient. planning to move o Beginner grower in Germany. Strains: Outdoor Classics. 1st batch (1mo old beginning oudoors then moved inside with lamp) + 2nd batch (2w) stretched. Using Sunlight Stixx 50 at 60% dim, 50cm distance, seedling soil. Not sure if light settings are the problem. What are next steps?

Leaves. Color - Yellow

Plant. Too tall

Setup. Lighting

10 days ago

4

2

Solved

What is happening? Leaves can someone please help me, what am i doing wrong? My guess is to much nutrients or oversalting - Nut lockout? it could also be, I have been watering them every day with fertilizer mix, without a day of water in between, but I always fertilize less than specified - Plagron

Leaves. Dropping off

Leaves. Color - Yellow

16 days ago

1

1

Solved

Super buff cherry Gelato grown with 20% Bruh science.My super buff cherry. Almost time to shock closed those stomata using hormone ABA(Asbisic Acid) inducing abiotic stress, simultaneously using light signals to increase terpene/flavinoid production while having no Pr/Prf conversion to release VOC via shocked closed stomata.

Buds. Not fattening

Leaves. Tips - Burnt

Feeding. Deficiences

21 days ago

1

5

Solved

Fan leaves turning extremely yellow late flower Hello. Day 61 of flower, Green Crack 2.0 by Humboldt seed organization. Soil based. All of a sudden all the fan leaves are turning yellow. Trichomes are clear, no exceptions. Is it from finishing or did I mess up watering/nutes in the last couple of weeks? Thanks in advance.

Leaves. Color - Yellow

22 days ago

4

4

Solved

What’s wrong?What’s wrong? Those yellow spots and holes appeared. Is it a deficiency?

Leaves. Color - Yellow

21 days ago

3

4

Solved

bruce banner 3 (zamnesia) wird blass Meine BB3 macht Probleme. Blass, Blätter hängen. 4monate alt und seit ca 2-3in 11L bb allmix. Gieße mit Biobizz (5mlGrow/1Bloom), pH kann ich nicht messen .hab thripse die ich nicht los werde)behandelt mit neudorff spurizid und blattlausfrei) Licht & Temp passen. Jemand ne Idee?

Leaves. Color - Yellow

a month ago

2

Solved

Leaf tips show a nutritional Maybe Ca deficiency and nutrient flush timing Leaf tips show a nutritional problem. Maybe Ca deficiency but adding extra of it since the beginning and or P excess. Thinking when time for nutrient flush. Maybe some degree of nutrient flush in combination with Ca? What do you think See week 14 for detailed question text

Leaves. Tips - Burnt

25 days ago

2

6

Solved

spaceweedgrower

Yellow spots and droopy leaves - RQS Shogun photo Hi! 2nd week after 1st true leaves. 70/30 buffered coco/perlite. Terra Aquatica Tripart. Feeding 2×/day, 200ml in, 100ml runoff. Always 1.5ml/L CalMag. pH ~5.9, EC diff ~150–300. Suspect calcium def., leaves droopy. 18/6 200w led 60cm. Room 23C, ~70% RH. Any help appreciated!

Leaves. Color - Yellow

8 days ago

1

2

Solved

Probleme bei meiner Gorilla Cookie Auto • Die erste Pflanze bekommt gelbe Spitzen an den neuen Blättern und ich weiß leider nicht, was das bedeutet. • Ein weiteres Problem bei der ersten Pflanze ist, dass die älteren Blätter an den Spitzen dunkelgrün sind und schlapper hängen. • Das dritte Problem ist die Breite der 1.

Leaves. Tips - Burnt

Leaves. Tips - Die

Leaves. Tips - Thick

6 days ago

5

2

Solved

Discoloration and yellow tips Hey guys I have this one clone that showing weird light green and very few yellow on some of the tip of the leafs, I think yellow tips might be from over watering but I'm not to sure, but I don't know about the discoloration on some leafs.

Leaves. Color - Yellow

6 days ago

6

6

Solved

About plants ..For those who have dealt with nitrogen deficiency, after correcting it, did the affected leaves regain their color, or did they stay the same while only overall plant health improved?

Leaves. Color - Yellow

a month ago

10

7

Solved

Verfärbte Blätter Verfärbte und teilweise vertrocknete Blätter bei meiner Autoflower in Woche 9. Nährstoffmangel, Nährstoffüberschuss, zu viel Licht? Grobe mit biobizz biogrow, biobloom und topmax. Woran könnte es liegen?

Leaves. Color - Yellow

Leaves. Color - Dark-brown

2 months ago

3

3

Solved

What issues do i have with leaves?I couldn‘t figure out the issues so i‘m leaving it to community. BioCanna soil with BioVega, BioBloom, BioFlores and Bio Rhizoton in 11l pot, Lumatek ATS 200W PRO (75%) in a 80x80 mamooth box. Light is at 50cm, climate is at 23C and 53% Thank u guys!

Leaves. Color - Yellow

2 months ago

4

Solved

Any thoughts on what it could be? 🤔I did some research and have my suspicions, but I'd like to hear your opinion! 🤔

Leaves. Color - Yellow

2 months ago

4

3

Solved

mid-flower yellow leaves Hello! I'm growing my first non-auto, a SkittleZ, it got quite small and the leaves are yellowish,I'd like to know what mistakes I made and what I can do to help her Mars Hydro TS1000 and only BioBizz nutrients. Temp is around 18C at night and 25/26C during the day, 40% hum

Leaves. Color - Yellow

Feeding. Deficiences

2 months ago

2

6

Solved

Leaves turning yellow and dying I have a plant that gets a lot of rust spots, even though I give it CalMag once a week. That plant also started getting a handful of leaves that turn yellow and fall off. Is there a nutrient I'm missing in my regiment? Should I do CalMag every watering for the rust spots?

Leaves. Dropping off

Leaves. Color - Yellow

Feeding. Deficiences

2 months ago

2

Solved

Nutrient burn , this bad?Started off in hot soil. My first organic run. 5th week bloom. 75degrees 35rh. 300w led 21" from canopy.Soil pH 6-7 Using Gaia Greens top dressing for feed . All Purpose and Bloom. Added Gaia all purpose to the soil, then extra non needed amendments.Not needed .Top fed monthy

Leaves. Edges burnt

Leaves. Tips - Burnt

Leaves. Dropping off

2 months ago

4

3

Solved

Yellowing tips Hi, I'm a newbie grower here. I have an autoflower that is nearly weeks old. I have started to notice some yellowing tips on the leaves. I have been feeding it some vitasol and pm13/14 as well as watering every two days. The growing medium is worm casing compost and perlite.

Leaves. Tips - Burnt

Setup. Strain - Autoflowering

2 months ago

1

1

Solved

Sudden Leaf Yellowing – Lighting Issue or Something Else?Hello! Yesterday, I noticed the top leaves turning slightly yellow, but today it looks dramatic. Check the pictures—leaves are yellowing and drying out rapidly. It’s only affecting the central leaves, so I suspect a lighting issue, but I’d like to confirm before taking action.

Leaves. Curl up

Leaves. Color - Yellow

2 months ago

3