I assume that proper seeding practices will be followed. Sowing additional seed does not improve a stand when poor seeding management is used. Table I. Seeding rates for alfalfa hay, alone and in mixtures, on dryland or under irrigation. Seed alfalfa between April 1 and May 15 in eastern and southern Nebraska, between April 15 and May 15 in western and northern Nebraska, or in August in all locations. Seeding can be extended to June 1 in spring if irrigation is available.
Soil moisture is usually favorable for plant establishment during early spring.
However, weeds can be a problem for spring seeding. August seeding avoids most weed problems, but depends on soil moisture, fall rains, and adequate time for the plants to develop strong roots in order to survive the winter. Use proven seeding methods. Seeds placed too shallow may fail to germinate. Seedlings that develop from seeds placed too shallow will dry out rapidly and die or develop poor roots.