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Plant Profile: Shrubby St. Johnswort (Hypericum prolificum)

St Johnswort shrubby Hypericum prolificumThis native of eastern and central United States is a small compact deciduous shrub with medium texture and rounded form. It produces yellow flowers about one inch across with five petals and a mass of stamens that may partially hide the petals. The flowers are produced in summer for several weeks or more and are followed by brown seed capsules that persist into winter providing interest after the leaves have fallen. The dark green leaves are linear and about one to three inches long. The light brown bark of older stems is exfoliating to reveal the pale orange inner bark. Shrubby St. Johnswort is easy to grow and does well in a sunny site in average, well-drained soil but tolerates less and can be found growing naturally in open woods, meadows, and on steep banks. As a garden plant it is useful grouped in a shrub border, in a rock garden or as a low hedge.

Type: Flowering deciduous shrub

St Johnswort Shrubby Hypericum prolificum flOutstanding Feature: Flowers

Form: Compact, dense, rounded

Growth Rate: Slow to medium

Bloom: Yellow flowers l” across are produced singly or in clusters for a long bloom time in summer; five petals, abundant sepals.

Size: 1-5’ H x 14’ W

Light: Full sun to partial shade

Soil: Average, well-drained, pH adaptable; moderately drought tolerant

Hardiness: Zones 4-9

Care: Low maintenance; prune after flowering if desired.

Pests and Diseases: Generally disease and pest free but can succumb root rot and wilt and in hot humid conditions.

Propagation: Seed; soft-wood cuttings.

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