What's causing the yellow and browning?

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Misfit1984

Active Member
Hey guys, overall this blue dream auto looks healthy with the exception of a few yellow and brown leaves. The effected leaves are on the very bottom. I'm growing in Sohum Living Soil and do not use any nutrients. I did topdress with compost prior to taking this picture, hence the dark, damp soil in the background. All signs point to either soil pH, nitrogen burn or potassium deficiency, but with this being my first grow I'm not sure. Any advice would be awesome!55e1e50c-f7e8-40df-ae00-73bbd8002ef6.jpg
 
NoWayOut

NoWayOut

Well-Known Member
Misfit1984 said:
Hey guys, overall this blue dream auto looks healthy with the exception of a few yellow and brown leaves. The effected leaves are on the very bottom. I'm growing in Sohum Living Soil and do not use any nutrients. I did topdress with compost prior to taking this picture, hence the dark, damp soil in the background. All signs point to either soil pH, nitrogen burn or potassium deficiency, but with this being my first grow I'm not sure. Any advice would be awesome!View attachment 4963810
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It looks like light burn actually.
 
Obepawn

Obepawn

Well-Known Member
Misfit1984 said:
It does, but I ruled that out since these are the lowest leaves on her. There's another 10" above that look beautiful, but who knows really
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That’s why I asked. I’m pretty sure it’s a potassium deficiency. Why is the question, ph, or nitrogen is my guess. That leaf in the photo is very dark green, if you are over feeding your pant nitrogen, it can interfere with potassium uptake also. That’s why balanced nutrition is important.
 
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Misfit1984

Active Member
Yea, I was leaning toward potassium also only because of what I've read online. I'm using Sohum Living Soil and haven't given any nutrients. So possibly the soil is a little hot? Today I did topdress and water in some Build-a-flower compost. Hopefully that doesn't make matters worse. How do you typically correct a potassium deficiency?
 
Obepawn

Obepawn

Well-Known Member
Misfit1984 said:
Yea, I was leaning toward potassium also only because of what I've read online. I'm using Sohum Living Soil and haven't given any nutrients. So possibly the soil is a little hot? Today I did topdress and water in some Build-a-flower compost. Hopefully that doesn't make matters worse. How do you typically correct a potassium deficiency?
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Fastest way is for your type of grow is liquid kelp. What did you just top dress with?
 
M

Misfit1984

Active Member
Obepawn said:
Fastest way is for your type of grow is liquid kelp. What did you just top dress with?
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Build-a-flower compost. It's basically compost geared toward plants in flower.

buildasoil.com

Build-A-Flower Top Dress Kit - Nutrient Boost - Maximize Blooms

Optimize your flowering plants' health with our Build-A-Flower Top Dress Kit. It combines two robust compost types with essential nutrients and minerals, plus Mustard Meal for pest control. Apply it easily to enhance nutrient uptake and promote vibrant growth. A must-have for gardeners aiming...
buildasoil.com

It does contain kelp meal, but I'd probably need more to correct this issue I'm assuming. The complete ingredient list is this:

Oly Mountain Fish Compost, Worm Castings, Canadian Sphagnum Peat Moss, Diamond K Ag Gypsum, Soft Rock Phosphate, Thorvin Icelandic Kelp Meal, Terviva Karanja Cake, BuildASoil Pre Charged Bio-char with Rootwise Mycrobe Complete.
 
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