How to Manage Pests

Pests in Gardens and Landscapes

Site selection

Walnuts do best in areas with full sun and deep well-drained soils (4–6 feet at least). Avoid planting in sites that stay wet, such as frequently irrigated lawns, flower beds or soggy, wet soils. Avoid sandy, high-clay, or shallow soils. Walnuts are adapted to areas with moderate chilling hours--500 to 1,000 hours below 45° F. Because of the early blooming habit of walnuts, avoid planting where late-spring frost occurs, Where late frost does occur, expect that crops will be light in some years.

If you are planting on a site where soil is shallow because of hardpan, break through the hardpan when preparing for planting. Do not plant trees too close together, as this may cause poor growth.

Site selection
Avoid low areas that accumulate water

Statewide IPM Program, Agriculture and Natural Resources, University of California
All contents copyright © 2017 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   Contact webmaster.