Ammonia spray on leaf litter

FWIW, I just bought a couple of 50 lb bags of urea for $12 each at my local feed mill. Call around I’m sure some local feed/garden store carries it.

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I would anticipate that ‘spraying ammonia’ on any plant material in the yard/orchard/garden would be a total waste, as the ammonia would mostly just sublimate off into the air.

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There is a source of nitrogen that’s completely free.

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What about ammonium sulfate(21,0,0)…it’s around $10 for a 20 lb bag at big box stores and Walmart.