60 Days. Avena sativa. Oat is a cool weather crop that can withstand light frost but will die back in the winter or at temperatures below 5 to 10°F. This plant is an upright annual cereal grass that thrives in moderate to cooler temperatures with moist soil. Oats have fibrous roots and can be sown earlier in the spring than many other annuals, allowing this plant to collect and reuse an abundance of soil nitrates in a short amount of time.Certified Organic.

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