Check the winners The Grow Awards 2026 🏆
Start My Diary
Start My Diary
Log In
Start My Diary
Home
Diaries
Strains
Shorts
Questions
Contests
Growers
Seeds
Breeders
Nutrients
Equipment
Blog
English
Log In
Sign Up
Following
Follow
Brands
&
Growers
to get updates
Back to Grow Questions
Help :)
JoshuaTreez
started grow question 5y ago
Is this potassium deficiency? Or nitrogen toxicity?
Solved
Leaves. Color - Yellow
likes
HighRoller909
answered grow question 5y ago
yeah both. Nitrogen excess can create potassium deficiency, bear in mind. Too much N will block usage of K
1 like
Complain
Selected By The Grower
Organoman
answered grow question 5y ago
I would go for potassium deficiency.
likes
Complain
Similar Grow Questions
Solved
McDavis
Hojas inferiores con puntas amarillas y secas
Se ha regado con enraizante y top veg de la línea top crop, la altura de la Luz está en 50cm
Leaves. Edges burnt
Leaves. Color - Yellow
3y ago
1
1
Solved
CoolGuy123
Leaves keep turning brown and yellow
It all begann with what I thought was light burn. I then considered it CalMag deficiency. Giving it CalMag did not stop it. My current guess is too low pH due to strip inaccuracies, so I gave it around 8 today instead. What do you recon, why could it keep getting worse?
Leaves. Color - Yellow
Leaves. Color - Dark-brown
1y ago
4
Solved
JoshuaTreez
Is this light burn?
All my leaf tips are going yellow, even on the bud leaves. It does seem to be a bit worse towards the top of the plant. Is this light burn? I am using 2x 1000w philzon LEDs in a 3.5'x3.5' Tent and I had them at 10/10 brightness. I just reduced to 8/10. Thanks in advance
Leaves. Color - Yellow
5y ago
1
3
Solved
CelticSmokey88
Yellow leaves
Bottom leaves starting to turn yellow had no problems with this girl until now currently at the start of week 7 veg any advice is really grateful thanks
Leaves. Color - Yellow
5y ago
2
1
Solved
JSanchezz
Is this Stating something or is it paranoya
I had a few leaves that were turning yellow, but they are lower leaves that are slightly yellowish on the outside, generally the plant has become a little lighter since it started flowering. Am I worrying too much? pictures were taken directly in the morning
Leaves. Color - Yellow
2y ago
4
Solved
lucasurfer420
Yellow streak on leaf
Hi guys reaching almost week 3 in few days. Just saw this yellow streak on the edge on right leaf ? What could be ? Thanks guys.
Week 2
Leaves. Color - Yellow
6y ago
6
4
Solved
Milf420
Everything was going great in week to until i put it out side for more sunlight because it was sunny that day and the leaves burned!!!😓 I just took it back inside and fed it with water. I hope my plant will be OK.?😢 If someone was this experience please write a comment
Leaves. Color - Yellow
6y ago
4
4
Solved
Misanthrope
Leaf Discolouration in Flowering
5 weeks into flowering, grown outdoor in potted soil with regular nutrients. I've been spraying with Epsom salt sol'n once/twice per week for 3 weeks to treat what I thought was Mg def. Yellowing is starting now on upper leaves. Suggestions on what other steps to take?
Leaves. Color - Yellow
Feeding. Deficiences
5y ago
2
2
Solved
Shmokeyb
Problem or not
First time. Week 7 flower in canna terra professional plus soil and canna terra nutrients, ph always 6.0 to 6.4. Temps have been reaching 32 but I've managed to get it to 28. Why so yellow?
Leaves. Curl down
Leaves. Color - Yellow
5y ago
5
5
Solved
SuperGreenGoblin
Yellowing spots on leaves
I've been always feeding less than the recommended dose. Fed every second watering and watered every 2 to 3 days. Grown in All-Mix from BioBizz from the beginning. Now suddenly in week 8 leaves started to yellow, some fell off and weird yellow and brown spots appeared. What is it
Leaves. Dropping off
Leaves. Color - Yellow
2y ago
2
2
Solved
Crisp1
Yellow spots
Any idea what this is? Im thinking calcium or magnesium deficiency ...dont think rust mold as it doesnt rub off.
Leaves. Color - Yellow
4y ago
2
4
Solved
Carrascovsky
Deficiency Signs
Hi guys. I need help. My plants are showing some brow spots and yellowing leaves, both symptoms are showing on the older leaves. I am only adding nutrients on every other watering, so I don’t think it’s overfert, can anyone help me to identify the issue?
Week 7
Leaves. Color - Yellow
6y ago
3
4
Solved
M4RKY
Special queen needs help!
Hi guys, me and my mates first grow. We have had to move it indoors as it's getting conspicuous and its has started to go yellow and stumped its growth. Should we still be feeding it nutrients? ( we are using 130w bulb 10 hours) thanks
Leaves. Color - Yellow
Setup. Lighting
Feeding. Schedule
6y ago
1
3
Solved
cannonone
Purple branches
Hey, many of my branches have turned purple, and a few leaves yellow.... I'm using bio grow (biobizz) since 5 days, is it calcium or magnesium deficiency? What to do? And can I start with flowering now? Thanks
Leaves. Color - Yellow
6y ago
1
3
Solved
Cookies_connoisseur
yellowing
Looking at my latest tent shot showing the yellowing etc after forgetting to water in a mini heatwave, is there anything anyone recommends to aid guiding them through to finish
Week 13
Leaves. Color - Yellow
Plant. Wilting
Plant. Stem - Red or purple
6y ago
1
1
Solved
Luna91
Two toned color
Hey Guys, What is this two toned color mean? I have this on one of my ladies and although I think its really cute, but Is there any reason for this color? and the buds with white sugar leaves are okay to smoke? Thanks
Week 12
Leaves. Color - Yellow
6y ago
1
2
Solved
Toking12am
Nutrient Burn?
The Durban Poison is showing some color change in its lower leaves. Im thinking this is a nutrient burn from to much nitrogen. Would that be everyone elses conclusion?
Week 5
Leaves. Color - Yellow
5y ago
8
4
Solved
einamio
Buon giorno weed doctors, did anyone have similar uniform chlorosis at the top or maybe knows what's up? What could be the reason and the solution? Th
Is this some sort of immobile nutrient deficiency or excess? Could this be caused by heat and light stress? She is 80cm tall and almost touches the lights in the tent. I'm usually suffering from Calmag and Nitrogen issues and haven't yet experienced yellowing from the top. Thanks
Week 8
Leaves. Color - Yellow
Plant. Too tall
Feeding. Deficiences
2y ago
2
2
Solved
Brudog
Can somebody please tell me what this is ??????
Noticed this on my plants leaves ive been feeding advanced nutrients micro grow and bloom at 2ml per plant and also big bud and b-52 at 2 ml per plant my plants in 2nd week of flowering any help would be great cheers guys 👍🏻👌🏼
Leaves. Edges burnt
Leaves. Color - Yellow
Leaves. Other
6y ago
1
2
Solved
Smeags
pH flux? Nute deficiency?
Problems... Diary and question the same. There are def burnt tips everywhere and the leaf fans are going from the bottom up. What should be my next step in fixing the problem and if it's going to affect yeild?
Week 7
Leaves. Tips - Burnt
Leaves. Veins - yellow between
Leaves. Color - Yellow
6y ago
3
3