How to Manage Pests

Pests in Gardens and Landscapes

Time to plant

Warm days and nights provide the best climatic conditions for growing corn. Frost will injure the plants at any stage of growth. For germination, soil temperatures should be between 70° to 80° F and should not go below 55° F. Air temperatures above 95° F and drying winds may cause poor pollination. It usually takes between 70 and 120 days for corn to reach maturity depending upon the planting period. Corn planted earlier usually takes longer to develop than corn planted later on in the year. However, planting early may help reduce some incidence of disease, such as smut.

In a suitable climate, corn can be planted more than once a year for a continuous harvest.

Planting Dates for Sweet Corn*

CALIFORNIA Direct seed
North and North Coast
Monterey County north
May–July

South Coast
San Luis Obispo County south

March– July

Interior Valleys
Sacramento, San Joaquin valleys
March–July

Desert Valleys
Imperial and Coachella valleys

Feb.–March and August

*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
All contents copyright © 2014 The Regents of the University of California. All rights reserved.

For noncommercial purposes only, any Web site may link directly to this page. FOR ALL OTHER USES or more information, read Legal Notices. Unfortunately, we cannot provide individual solutions to specific pest problems. See our Home page, or in the U.S., contact your local Cooperative Extension office for assistance.

Agriculture and Natural Resources, University of California

Accessibility   /PMG/GARDEN/VEGES/CULTURAL/swtcornplant.html revised: April 25, 2014. Contact webmaster.