Fall Frost Damage in Soybeans Soybeans are easily damaged by frost in the 28 degree F to 32 degree F range. Temperatures of 28 degrees F for any extended period of time can completely kill soybean plants (stems and leaves). Beans that are still green and soft will shrivel. Stalks rapidly turn dark green to brown and will not recover. Beans in pods that have turned yellow will mature normally. Some green beans will turn yellow after 30-40 days of storage. Back to Frost - Soybeans
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