Weekly applications of irrigation sufficient to wet the soil 8 inches deep should be adequate. After the first growing season, asparagus plants do not require frequent irrigation because of their deep and extensive root system. Remove brush during each succeeding spring before the asparagus emerges, and broadcast lime if needed. Rake the fertilizer and lime 1 to 2 inches into the soil, taking care not to damage the asparagus crowns. Maintain good foliage growth.
Weeds shade asparagus, compete for water and nutrients, and reduce yields.
Varieties Several hybrid varieties of asparagus are available. They usually give better yields and larger spears than standard varieties. They are, however, more expensive than standard varieties. Standard varieties can still be very productive in a home garden. The most serious disease of asparagus is Fusarium root rot.