Marin Master Gardeners
University of California
Marin Master Gardeners

Plant Guide

Hypericum moserianum

Common Name
St John's Wort/Gold Flower
CA Native
Non-native
Plant Type
Shrub
Size
3' x 3'
Flower Color
Golden Yellow
Bloom Time
  • Fall
  • Summer
Leaves
Blue-Green
Evergreen
Evergreen
Deer Resistant
Seldom Damaged
Wildlife Value
  • Bees
  • Butterfly & Other Insect Nectar
Growth Rate
Moderate
Hardiness
Hardy
Adverse Growth Factors
None
Special Features
  • Low Maintenance
  • Showy Flowers
Water Use
  • Low
Soil pH
6.5-7.5 (neutral)
Exposure
  • Full Sun
  • Partial Shade
  • Shade
Soil Type
Not Particular
Drainage
Good Drainage
Description and Cultural Plant Tips

H. moseranum is an evergreen/semi-evergreen, mounding shrub with arching, reddish branches and clusters of 2.5 inch across golden yellow flowers. In most of Marin this is an evergreen plant but in areas where freezing temperatures occur it may die back to the ground but will regrow from the roots. It can be used in a shrub or perennial border , along a fence or in a container.

Plant slightly above soil grade in average soil. Adding compost will help aerate the soil and add nutrients which will improve the health and bloom capacity of this shrub. Plant in full sun along the coast but in light afternoon shade in the hotter parts of Marin. Can withstand drought-like conditions but looks better with some summer water.

Bees enjoy the nectar from this shrub.

No serious pests or diseases.

Master Gardener Comments
Varietals

H. moserianum 'Tricolor' - leaves green with pinkish-cream edges with bright yellow flowers, 12"- 24' tall

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