How to Manage Pests

Pests in Gardens and Landscapes

Hawthorn—Crataegus spp.*
Family Rosaceae (Rose family)

Plant identification

Hawthorn is a deciduous tree, 15 to 30 feet tall with thorny branches. Flowers bloom in spring; fruit occur in summer.

*Some species are invasive weeds. Other types of plants may be better choices when planting.

Optimum conditions for growth

Hawthorn trees grow in several climatic zones, including coastal areas of Northern California and cold winter zones of California, Washington, and Oregon. Trees do best in full sun with moderate water requirements. Avoid excessive water as it leads to overabundant shoot growth. Thinning is required to keep the tree open.

Hawthorn leaves and flowers
Leaves and flowers of hawthorn

Pests and disorders of Crataegus spp.


Invertebrates (continued)


Environmental disorders



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