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 kreg
Registered: 09/15/21
Posts: 1,479
Last seen: 2 years, 6 months
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 Nitrogen Lockout 
#850594 - 10/06/21 06:02 PM (3 years, 7 months ago) |
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At what point do you give up on nute-locked plants?
What do you do to fight it before you give up?
I was thinking kelp foliar spray would help, but doesn't seem like it.
I've heard that flushing nute-locked plants works but IME doing the opposite and trying to let them dry out before returning to light waterings seems to work best
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This site is dead and nobody here is even growing
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 Data
That Guy
Registered: 08/12/08
Posts: 4,068
Loc: Southwestern US 
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 Re: Nitrogen Lockout [Re: kreg] 1
#850617 - 10/07/21 03:57 AM (3 years, 7 months ago) |
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Nutrient lockup is caused by a buildup of salts and plant metabolites in the soil surrounding the roots. These compounds interfere with active transport of nutrients and metabolites across the root surface.
In mild cases, the uptake of nutrients doesn't completely stop, and the plant will eventually absorb some of the excess nutrients and halfway fix the problem. This is what you are encouraging when letting the plant soil out and then watering lightly. While the plant may survive, it's still not removing the compounds causing issues, so it's not the best solution.
In the majority of cases, it is best to flush the soil to remove the excess nutrient salts and the buildup of plant metabolites. Flushing with pH-balanced water, especially with a chelating agent, will "reset" the root environment, and allow the plant to quickly recover, albeit with a small amount of brief overwatering stress.
I've found that watering plants to 10% runoff (that is, the volume of runoff is roughly equal to 10% of the soil volume) tends to avoid nutrient lockup by continuously removing built up salts and metabolites, much like a plant in outdoor settings. I also like to flush periodically with 200-300% runoff to make sure that the soil is always in that right range of pH and nutrient content.
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“The Universe is under no obligation to make sense to you” -NDT
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kreg
Registered: 09/15/21
Posts: 1,479
Last seen: 2 years, 6 months
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Re: Nitrogen Lockout [Re: Data]
#851192 - 10/21/21 09:42 AM (3 years, 6 months ago) |
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Thank you Data. For now I'm starting new seeds in coir, and coast of maine seed starter mix. I've got loads of my house soil now but I'm afraid to use it because I'm worried it's too hot.
I've got more coir on the way to cut it with for when my next round of seedlings is ready to get out of solos
Is there another amendment I could add to my house soil to cut it and fluff it up some other than coir and perlite? .... maaaaaybe something I could find outside and de-bug somehow?
My mind wandered to moss but then immediately to "oh wait, bugs"
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Data
That Guy
Registered: 08/12/08
Posts: 4,068
Loc: Southwestern US
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Re: Nitrogen Lockout [Re: kreg]
#851195 - 10/21/21 10:53 AM (3 years, 6 months ago) |
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You can pasteurize your soil amendment to kill off bugs without fully sterilizing it.
You can add peat moss to it, peat moss is generally a good seed starting medium, but it isn't fully inert, and can push the soil pH lower.
If you're worried about lockout, flush your soil well with a chelating additive and measure the pH with a soil test kit. If it's highly acidic, then you can either add alkaline amendments to balance it out, or balance your nute solutions a little basic and feed to 10% runoff each time. Do the opposite for alkaline test results.
Just remember that while nutrients are essential for the plant to reach its potential, its not critical that you push the nute levels to the limit. It's generally better to err on the light side when dosing nutes, and adjust slowly.
Best of luck 
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“The Universe is under no obligation to make sense to you” -NDT
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kreg
Registered: 09/15/21
Posts: 1,479
Last seen: 2 years, 6 months
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Re: Nitrogen Lockout [Re: Data]
#851196 - 10/21/21 11:54 AM (3 years, 6 months ago) |
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That's great info! I had known some about ph mostly that I want lower in veg, neutral in flower-
So will the plants will take in less nitrogen if the soil and water is more pH neutral?
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Data
That Guy
Registered: 08/12/08
Posts: 4,068
Loc: Southwestern US
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Re: Nitrogen Lockout [Re: kreg] 1
#851201 - 10/21/21 01:30 PM (3 years, 6 months ago) |
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“The Universe is under no obligation to make sense to you” -NDT
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kreg
Registered: 09/15/21
Posts: 1,479
Last seen: 2 years, 6 months
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Re: Nitrogen Lockout [Re: Data]
#851214 - 10/22/21 02:40 PM (3 years, 6 months ago) |
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Quote:
If you're worried about lockout, flush your soil well with a chelating additive
Like calmag? Or? I have other nutes but i had been reducing back to just running plain Ph and N ehen needed after soil got nice and sandy dusty. But i still have all the extra stuff i bought as total noob. What about flushing with the product Herculean Harvest? I was doing that but i figured using plain water would be better than adding more anything in- but the herc also brings the ph down, soo... Idk
Im still learning, been a long ass journey.
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