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Hypericum calycinum
Hypericum calycinum

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Zones 2B, 3-24, 31-34, 39
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Full, Partial
Regular Water

Hypericum frondosum

St. Johnswort
Deciduous, Evergreen, Shrubs


All bear single flowers with prominent sunburst of stamens in center. Shal­lowly cup-shaped, five-petaled blooms range in color from creamy yellow to gold; flowers may be solitary or in clusters. Neat, fresh green foliage. Various species used for mass plantings, ground covers, informal hedges, borders. Grow especially well in mild, moist regions.

A difficult-to-control rust is extensively infecting plantings (especially those of the species H. calycinum) in the Pacific North­west. Remove and destroy blighted leaves and any leaf litter; avoid overhead watering of plants in the evening.

Hypericum frondosum

Native to the southeastern United States. This shrub is everygreen in mild climates, deciduous where winters are cold. It grows 1–3 ft. tall, with mounding form. Blue-green leaves set off clusters of 1 1/2-in., bright yellow flowers that bloom from midsummer to early fall.

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Hypericum calycinum

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