The Grow Awards 2026 🏆 
Potassium Deficiency
The42started grow question 5y ago
Is this potassium deficiency? 21 days old from seed, no feed yet, ocean forest
Open
Leaves. Edges burnt
likes
Answer
smoke24answered grow question 5y ago
21 days old in OF soil, you won't have any deficiencies, OF runs hot, but the plants should grow into it, as long as you don't add too many additional nutrients. Happy growing.
likes
Complain
Similar Grow Questions
Solved
BillMonroe
* Spots (pic 4), on only 3 leaves of the plant at the top.
Last week, before lights out, I misted. By lights-on time, some parts of the plant were still wet. Is this some water burn?
Tap water is PHd and ~215 ppm (plenty ca/mg)
* Any insight on those yellow tips is welcome! :)Week 6
Leaves. Edges burnt
8y ago
8
6
Solved
CoronaGrower
Yellowing leaves.Accidentally resolved my original question instead of liking a suggestion and I cant change it 😅
Same issue still applies for now.
I have been testing the PH going in but not out so I will try this and pass on my results after the next water 👍
Open to all observations.5y ago
1
1
Solved
kking6321
K deficiency or nute burn? And some small holes in leaves.looking for some advice for 2 things. I've been doing a lot of reading & am wondering if this may be k deficiency instead of nute burn as i originally thought. The leaves are browning all along the edges, & some yellowing on the leaf. Second, seeing a few holes in some leavesLeaves. Edges burnt
Leaves. Veins - yellow between
6y ago
1
4
Solved
That70sDude
New growth with yellow on the leaf edges is spreading. I have moved the lites to 12", the only change has been from using distilled water for the 1st 3 weeks then started using filtered well water (high sulfur & iron content) Should I switch back? Where to buy?Week 5
Leaves. Edges burnt
5y ago
2
Solved
Kmurr07
Nutrient burn?What nutrient burn is this? I only assume nutrient burn bc it showed up a day after feeding. Thank you!Week 9
Leaves. Edges burnt
3y ago
1
Solved
EmberWeed
What could it be?I'm a relatively new grower and I don't have a diary setup yet. I know it's hard to diagnose a problem when there is no diary, sorry!
They were good until they started to yellow. They are in their 5 to 6 weeks of flowering. Some are good some are yellow and I feed them the same.Leaves. Edges burnt
Leaves. Color - Yellow
3y ago
5
4
Solved
Tkultranewb
Hey all I just wanted a honest opinion of what my grow in this stage is looking like is it on track and are they the right size or should i let them stretch some for bigger taller or was keeping them short and trying to get them bushy short in veg right idk just honest opinionsWeek 2
Leaves. Edges burnt
7y ago
1
1
Solved
Ancient_Genetics
What deficiency this is ?Perhaps in these pictures you can see better, what deficiency this is, whether it is phosphorus, potassium, magnesium or zinc?.Leaves. Edges burnt
Leaves. Curl down
Leaves. Color - Yellow
4y ago
1
Solved
kushinator
Help! Lower fan leaves drying out slowly at the tips and edges. Doesn't look like nitrogen deficiency to me, but please prove me wrong!10 days ago the lower set of leaves started drying out (they get brown not yellow). They don't receive light, but now it's already started showing on the third set of leaves. Does it look like nitrogen deficiency or can it be something else? Just gave it full strength nutes.6y ago
2
2
Solved
CHILLING_RACOONS
NEED HELP! CRUCIAL PHASEExcess or deficiency?
I'm in the crucial phase of buds development, some leaves are getting brown and seems to be burned but I don't know if it is a burn or a deficiency.. On 17/01 I gave 2ml/lt npk 4-8-8 and npk
1.7-0-3 1ml/lt? What should I do? Could someone explain? Thank you❤️3y ago
3
3
Solved
MiyaguiOkPolilla
Que pasó aquí?Alguien sabe que ha pasado aquí? Luego de dos dias (de haber doblado la planta y cortado 1 hoja y 2 ramas laterales ) se puso así. La nutricion fué la misma que de costumbre pero tuvimos una temperatura minima de 16c° y humedad del 55%.Manchas blancas son diatomeas post problema.Leaves. Edges burnt
3y ago
2
2
Solved
Grower422
White Widow Automatic in soilWatering every 3-4 days with about 1.75 liters, Drainoff Ph 6.8
Once a week feeding biobizz fertilizer, about 1/3 of the recommended amount. Grow, Bloom, TopMax, Active Vera, Bio Heaven. Since 1 week CalMg 0,5 ml/l
It started 1 day ago, after watering and feeding.
ThanksLeaves. Edges burnt
Leaves. Color - Yellow
2y ago
1
1
Solved
DrGreenThumb95
I have a little concern with the photo I have marked for questioning, to be honest I dont know what's going on I was wondering if someone could help me out do I need to be worried or is it just a burn/dehydration, I dont know, any help would be appreciated thanks guys👍👊Week 12
Leaves. Edges burnt
7y ago
5
2
Solved
Selen
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?Week 6
Leaves. Edges burnt
7y ago
3
3
