Plants die when the crowns are completely covered with soil. Poor plant growth results from setting plants too high, exposing the crown area where new roots initiate. Plants should be sprinkler-irrigated within a few hours after planting. Emerging roots are very sensitive to drought and salinity. Any condition that inhabits or slows growth will reduce yields.
Regular irrigation is needed after planting and is necessary during dry periods in winter.
It is particularly important to irrigate summer plantings frequently during the first 3 months after planting. Sprinkler-application rates should be low enough to prevent accumulation of free water in the furrows. Plant spacing will vary according to the cultivar, planting system, soil type, and the grower's preference. Double-row beds are recommended for summer plantings and some winter planting. The four-row beds used mainly in winter planting range from 60 to 68 inches with a row spacing of 12 to 14 inches.