St. John's wort

Hypericum frondosum ‘Sunburst’

Photo/Illustration: 
Jennifer Benner
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St. John's wort (Hypericum frondosum ‘Sunburst’)
hy-PARE-ih-kum fron-DOE-sum
Genus:  Hypericum
This is a small, upright, mounded, deciduous shrub with attractive, flaking reddish-brown bark on mature stems and striking, linear to oblong blue green leaves. Midsummer to early autumn, this plant bears golden yellow flowers with striking, bushy center stamens. Reddish-brown fruit capsules ripen in September and persist well into the winter. St. John's wort excels in the Midwest.
Noteworthy Characteristics:  A popular cultivar with slightly larger flowers on a more compact plant than the species. Foliage is evergreen to semi-evergreen in the southern part of its growing range. Use in hedges, shrub borders, foundation plantings, or en masse. May be susceptible to winter damage, which will not affect flowering.
Care:  Provide full sun to part shade and moist but well-drained, rich, sandy soil. 'Sunburst' will tolerate some drought. Mulch in winter.
Propagation:  Sow seed in a cold frame in autumn. Divide in spring or autumn. Take softwood cuttings in late spring; greenwood or semi-ripe cuttings in summer.
Problems:  Thrips, scale, anthracnose, rust, and leaf spots. Wilt and root rot, particularly in hot and humid climates.

Overview

Height
3 ft. to 6 ft.
Spread
3 ft. to 6 ft.
Growth Habit
Clumps
Light
Full Sun to Part Shade
Moisture
Medium Moisture
Maintenance
Low
Characteristics
Interesting Bark,
Showy Flowers,
Showy Foliage,
Showy Fruit
Bloom Time
Fall,
Summer
Flower Color
Yellow Flower
Uses
Beds and Borders,
Hedge,
Specimen Plant/Focal Point
Seasonal Interest
Spring Interest
Tolerance
Drought Tolerant
Type
Shrubs

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