How to Manage Pests

Pests in Gardens and Landscapes

Time to plant

Asparagus is a perennial crop that requires two distinct periods--a growing period and a resting period. If drought or cold weather do not stop vegetative fern growth, shoots will become spindly and less vigorous each year. If beds are established with 1-year-old crowns, planting occurs in mid to late winter. For growing your own transplants in a greenhouse, plant seeds in flats 10 to 12 weeks before recommended planting periods.

In the garden, optimum root and fern growth develops with temperatures in the range of 65° to 85° F. Growth is retarded with temperatures below 55° F or above 85° F. For seedling transplants, the ideal greenhouse temperatures are a nighttime low of 65° F and a daytime maximum of 85° F. For direct seeding, the optimum germination temperature is between 77° to 86° F.

Asparagus can be planted from transplants, roots, or shoots.

Planting Dates for Asparagus*

CALIFORNIA Direct seed or transplant
North and North Coast
Monterey County north
Jan.–March

South Coast
San Luis Obispo County
south

Jan.–Feb.

Interior Valleys
Sacramento, San Joaquin valleys
March–April

Desert Valleys
Imperial and Coachella valleys

Feb.–April

*Transplants may be started indoors from seed 4 to 6 weeks before the last frost date. Areas are large, so planting dates are only approximate, as the climate may vary even in small sections of the state. Contact experienced gardeners in your community and experiment on your own to find more precise dates.


Statewide IPM Program, Agriculture and Natural Resources, University of California
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