How to Manage Pests

Pests in Gardens and Landscapes

Hypericum, Gold flower, St. Johnswort—Hypericum spp.*
Family Hypericaceae (St. John's-Wort family)

Plant Identification

Hypericum is an evergreen, semievergreen, or deciduous shrub or perennial.  Flowers are yellow and resemble roses.  They may be produced singly or in clusters. 

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

Optimum conditions for growth

Hypericums are planted as ground covers, hedges, or borders.  They do well in areas with full sun but require partial shade in very hot climates.  Provide moderate to regular amounts of water.  They do best in mild, moist areas.  Reduce disease development by avoiding overhead watering in the evening.

Flower of hypericum
Flower of hypericum


Pests and disorders of Hypericum spp.



Environmental disorders



Flower and leaves of hypericum
Flower and foliage of hypericum

Foliage of hypericum
Foliage and flower bud of hypericum

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