The soil should not be saturated for more than a few days. Apply water early in the day so that plants dry quickly. Plant spring-blooming flowers and trees nearby to attract bees to the area. Do not use insecticides during bloom period. Other pollination problems can be caused by temperature.
Cool temperatures can slow pollen germination and prevent complete fertilization.
To raise cool spring temperatures, plants can be grown under row covers. However, row covers must be removed periodically so insects can pollinate the flowers. Mechanical cultivation followed by mulching with 3 to 4 inches of weed-free straw between rows will control weeds. Mulch also maintains soil moisture. For winter protection, add enough mulch to cover the entire plant to a depth of 2 to 3 inches.