how long will hot pepper spray stay fresh for the organic garden?

I have a big supply of hot peppers and I want to make them into a garden spray for pest prevention. I was hoping to make it into one big batch and have the spray last for a year. Is this possible?

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An odor free toilet where solids gets removed 2-3 times per century. It isolates pathogens and yields an odor-free, bacteria free liquid fertilizer. No transport, energy efficient, no water used and no water pollution.