Some years, however, are harder on these seedlings than others, and this is one of those years. Because of the extended hot dry weather, alfalfa seedlings are experiencing more stress than usual. Anything you can do to reduce stress and competition will help.
First, control weeds. Weeds use moisture and intercept light, two critical needs of seedlings. If weeds aren't too large and are growing actively, herbicides are a good option. Otherwise, clipping may be necessary. If you must clip, leave a tall stubble so seedlings don't go into shock after clipping and be careful not to smother seedlings with your clippings.
Second, scout for insects. Leafhoppers, aphids, grasshoppers, and other insects cause extra problems during stressful weather. Timely insecticide application or mowing is more important than ever.
Third, consider topping off your dryland alfalfa, even if there isn't enough to harvest. The larger the plant, the more soil moisture it needs to survive. Making plants smaller by clipping will reduce the plant's moisture requirement, relieving some stress and conserving what little moisture still remains.
Drought conditions may make growth difficult for alfalfa seedlings, but with a little extra care, they can get a good start.
Bruce Anderson
Extension Forage Specialist
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