Made a mistake the last 6 weeks, learned from it.

calvin.m16

calvin.m16

Well-Known Member
Were the deficiencies perhaps yellowing/rusting of leaf edges? I think they lie about how much magnesium is in their base fertilizer because if its 2% Magnesium in their 12-4-16 you shouldn't need to be supplementing with Epsom Salts. Most bases I ran prior had maybe 0.7-1% Magnesium and zero issues.. weird...

Are you saying that after using Epsom Salts you no longer saw burn or deficiencies? I am curious why we are needing to add so much magnesium?
 
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calvin.m16

calvin.m16

Well-Known Member
To me it looks like burn but they have only been getting 1.00 EC of 12-4-16 RO feed in coco and the roozone pH was 5.7-5.8 per bluelab stabby root meter and rootzone EC was 1.8-2.0. I give them plain water once a week as well..

I'm not using Epsom salts or any other additives and haven't had problems. I normally would add MPK but I wanna see how it does without on these particular plants.

EC818991-14FB-4981-A3E6-31F008EAE491.jpg
 
C

cryologist

Member
calvin.m16 said:
To me it looks like burn but they have only been getting 1.00 EC of 12-4-16 RO feed in coco and the roozone pH was 5.7-5.8 per bluelab stabby root meter and rootzone EC was 1.8-2.0. I give them plain water once a week as well..

I'm not using Epsom salts or any other additives and haven't had problems. I normally would add MPK but I wanna see how it does without on these particular plants.

View attachment 5177127
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have u been feeding to runoff? looks way overfed. rootzone ec should not be much dif than input
 
calvin.m16

calvin.m16

Well-Known Member
twentyeight.threefive said:
Those look extremely potassium deficient along with a slight nitrogen excess. That doesn’t look like nutrient burn.
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That would make sense because they are floppy as fuck. Damn well I'm going to try throwing some MPK at them and see if that helps.. I have some 0-14-43 Bulky B from FloraFlex on hand.. Probably start with a teaspoon per/5 gal and see what happens. (They recommend 1-5 teaspoons per/5 gal) First time running this formula and I haven't dealt with deficiencies in a long time. I agree with heavy N though that is why I wasn't sure if its a deficiency.

Here are some plants that just went out, same feed, different strains though.
IMG_7606.jpeg
 
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Hiphophippo

Hiphophippo

Well-Known Member
I would say potassium deficiencies because of the leaf burnt tips also I do not grow in coco but that’s what it looks like to me.
 
twentyeight.threefive

twentyeight.threefive

Well-Known Member
calvin.m16 said:
That would make sense because they are floppy as fuck. Damn well I'm going to try throwing some MPK at them and see if that helps.. I have some 0-14-43 Bulky B from FloraFlex on hand.. Probably start with a teaspoon per/5 gal and see what happens. (They recommend 1-5 teaspoons per/5 gal) First time running this formula and I haven't dealt with deficiencies in a long time. I agree with heavy N though that is why I wasn't sure if its a deficiency.

Here are some plants that just went out, same feed, different strains though.
View attachment 5177235
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Excess nitrogen will prevent potassium uptake. I’d start with fixing the nitrogen excess before throwing more at it. Or start very low dosage with the 0-14-43, that sounds like some very strong stuff.
 
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