How to Manage Pests

Pests in Gardens and Landscapes

Hydrangea—Hydrangea spp.
Family Saxifragaceae (Saxifrage family)

Plant Identification

Hydrangeas are fast-growing deciduous shrubs and vines.  Leaves are large and flowers are produced in clusters during the summer and fall.  Flowers may be white, blue, pink, or red. 

Optimum conditions for growth

Hydrangeas are often planted in containers.  They do well in areas with full sun but require partial shade in very hot climates.  Provide regular amounts of water.  Hydrangeas are very sensitive to soil type.  They need rich, porous soil.  In some varieties, flower color can be affected by soil pH.  Prune after bloom to maintain shape.  Reduce the number of stems to get the largest flower clusters.

Leaves and blossoms
Hydrangea leaves and blossoms

Pests and disorders of Hydrangea spp.



Environmental disorders



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