This article was originally posted on Field Crop News Written by Joel Bagg. Alfalfa frost damage can sometimes occur in the spring after growth has started, resulting in damaged growing points. Some wilting can be visible about 24 hours after frost or some yellowish or brownish discolouration 3 or 4 days later. The top of the stems will typically bend over with a “shepherd’s hook”. Damage is often minimal and plants will grow out of it, but some yield loss and development delay can result. Thin alfalfa stands are more susceptible to frost damage. “Light Frost” Damage The extent of frost damage to the alfalfa will depend on the severity of the freezing. Temperatures in the plant canopy level are usually…
