Living soil nutrient burn?

sensaisamurai

sensaisamurai

Active Member
Hey all!

So I'm about 1 month from transplant into my second living soil mix which is basically the coots recipe. I top dressed last week with what I now think was a pretty heft top dress of homemade worm castings, neem seed meal, kelp, alfalfa and malted barley powder.

About 4-5 days later my leaves started show show signs of yellowing around the outer leaf margins and tips of the top leaves of the secondary branches.

I have 3 plants; shishkaberry front right, critical kush back left and space cookies back right. It has just recently started happening on the kush but the other two started a few days earlier.

Anyone have any idea what this could be or if I should worry about it. I want to resolve it before switching to flower.

Any help or experience would be appreciated!
 

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PadawanWarrior

PadawanWarrior

Well-Known Member
Budzbuddha said:
Early potassium deficiency
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Shit man. I think you're probably dead on. I'm new to K deficiency, but have been seeing similar issues with my no-till. Thank god for people like you and @Renfro. You guys just made my life a lot easier, lol. I will be giving them more K now, starting tonight when I water. I was first thinking it was P deficiency, haha, shows how good I am at diagnosing nute issues. I will be getting some Sul-Po-Mag soon, but until then I will use the Earth Juice Meta K I have already. Thanks again guys, you're awesome.
 
Bignutes

Bignutes

Well-Known Member
Be careful on the sulpomag, it could also be from too much magnesium. This is taken from a website:

What is the K:Mg Ratio?

The K to Mg ratio is taking the base saturation of potassium and dividing it by the base saturation of magnesium.

Eg: A soil test with 4.5% K and 18%Mg means 4.5/18 = 0.25. This means the ratio is 0.25.

What does it indicate?

The K/Mg ratio can be indicative of how available the potassium and magnesium are in the soil. If for example your ratio is less than 0.25, it typically indicates that the magnesium in the soil is over powering the potassium in the soil making it harder for the plants root system to uptake potassium. If the ratio is <0.35 it can indicate that the plant may have trouble accessing magnesium. There are other factors to consider, such as how the other cations play into this as well, but we will talk about that another time!

www.yaracanada.ca

Plant Nutrition - Potassium to Magnesium Ratio | Yara Canada

Newsletter - October 8, 2018
www.yaracanada.ca www.yaracanada.ca
 
PadawanWarrior

PadawanWarrior

Well-Known Member
Bignutes said:
Be careful on the sulpomag, it could also be from too much magnesium. This is taken from a website:

What is the K:Mg Ratio?

The K to Mg ratio is taking the base saturation of potassium and dividing it by the base saturation of magnesium.

Eg: A soil test with 4.5% K and 18%Mg means 4.5/18 = 0.25. This means the ratio is 0.25.

What does it indicate?

The K/Mg ratio can be indicative of how available the potassium and magnesium are in the soil. If for example your ratio is less than 0.25, it typically indicates that the magnesium in the soil is over powering the potassium in the soil making it harder for the plants root system to uptake potassium. If the ratio is <0.35 it can indicate that the plant may have trouble accessing magnesium. There are other factors to consider, such as how the other cations play into this as well, but we will talk about that another time!

www.yaracanada.ca

Plant Nutrition - Potassium to Magnesium Ratio | Yara Canada

Newsletter - October 8, 2018
www.yaracanada.ca www.yaracanada.ca
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Good info. Too much Mg locks out K, and too much K locks out Mg. I can actually use that knowledge right now, lol. That makes a lot of sense, and it will definitely help me diagnosis nute issues in the future. Thanks man.
 
Bignutes

Bignutes

Well-Known Member
Shoot for a ratio of 0.40 to 0.67. From what I gather is a lower ratio for clay up to 0.67 for max on well drained like what we'd use for a mix. To note this ratio isn't based off of percentages it's on meq of each as has it's own formula for each.
 
Budzbuddha

Budzbuddha

Well-Known Member
Easily correctable ... Kelp or kelp meal .
A good “ seaweed “ amendment ( kelp me kelp you , Dr. Earth Seaweed solution , bio weed , recharge and others ) check label.
Dry nute “ scratched “ into top soil ( kelp meal ) like Down to Earth brand - good stuff. Matter of fact a scoop added to your container grow bumps flowering nicely. I plan to run it my layered mix of FFOF / EB Stone ( in the upper half EB stone ) as the top fill. I usually water kelp in at flower ( week 2/3 to start ) to cover the PK issue up front and once a week during mid / late flower for “ boost “ instead of synth Beastie Bloom or similar.
 
sensaisamurai

sensaisamurai

Active Member
Budzbuddha said:
Easily correctable ... Kelp or kelp meal .
A good “ seaweed “ amendment ( kelp me kelp you , Dr. Earth Seaweed solution , bio weed , recharge and others ) check label.
Dry nute “ scratched “ into top soil ( kelp meal ) like Down to Earth brand - good stuff. Matter of fact a scoop added to your container grow bumps flowering nicely. I plan to run it my layered mix of FFOF / EB Stone ( in the upper half EB stone ) as the top fill. I usually water kelp in at flower ( week 2/3 to start ) to cover the PK issue up front and once a week during mid / late flower for “ boost “ instead of synth Beastie Bloom or similar.
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Thanks buds!

I have a mixed kelp into my soil at 1/2 cup per cubic foot. I'm using acadian sealpants kelp and I'm gonna try and mix up a kelp tea and do a foliar and drench. Hopefully it clears up. I wanna flip these bitches to flower soon. Its gonna turn into a forest in that tent if I leave it too much longer lol.

I'll brew for 2 days then apply and make sure to post my results if it works or not!
 
Bignutes

Bignutes

Well-Known Member
sensaisamurai said:
Brewed up some kelp/alfalfa tea at 1/4 cup of each and bubbled for 36 hours. Added agsil and ful-humix and foliar fed and watered in.

I'll continue to post updates every couple days.

Hoping for the some nice healthy girls before flipping into flower.
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Cut it down to size and get it healthy, if its not healthy by flip youll have serious problems.
 
sensaisamurai

sensaisamurai

Active Member
Just an update for anyone else having this problem in a similar situation.

It has been 10 days since my last post and the problem of the yellow leaf tips on new growth still continues, although it seems to be getting slightly better.

Besides that the plants look really healthy are growing vigorously! They are on day 8 of flower and I'm hoping for the best.

I will continue to post updates every week or so.
 

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sensaisamurai

sensaisamurai

Active Member
Quick update. Things are looking fine. I'm pretty sure it was just some light burn. It's my first run with some hlg 288 v2 quantum boards and I raised them up to about 24 inches above the canopy and running each board @ 140 watts.

Back left- Dinafem critical kush
Back right- bagseed from a friend
Front right- barneys farm shishkaberry
 

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