St. John's Wort Plant
Profile
St. John's Wort (Hypericum
spp.) is a dense, mounding shrub or
woody perennial plant often used as a groundcover. It has large, bright-yellow
flowers that bloom in summer.
It prefers to grow in fertile, well-drained soils in full
sun to part shade. It is hardy to zones 4 to 8. It is deer-resistant and also
drought-tolerant once established.
You can prune them in late summer after flowering to neaten
up their appearance.
St John’s Wort can be used as a low border or informal
hedge. They are often planted on slopes for erosion control.
The common St. John's Wort (Hypericum perforatum) came over from Europe with the colonists and
is prized for its medicinal uses. It gets its common name from St. John the
Baptist, whose saint’s day is June 24, which is the traditional date to harvest
the flowers. Other common names for it include Goatweed, Devil’s Scourge, and
God’s Wonder Plant – among many others.
The Shrubby St. John's Wort (Hypericum prolificum) is native to the Mid-Atlantic region and
eastern half of the United States. It prefers rocky soils, but is clay-tolerant.
The Kalm St. John's Wort (Hypericum kalmianum) is native to the Great Lakes region. It grows
to about 3 feet high.
The Golden St. John's Wort 'Sunburst' (Hypericum frondosum) is native to the American south. It grows to
about 4 feet high and is more heat-tolerant than other varieties, but it is
also more susceptible to root rot when planted in damp soils.
St. John's Wort: You
Can Grow That!
The
video was produced by Washington Gardener Magazine as part of our Plant
Profile series for Mid-Atlantic USA gardeners.
Video and editing by Taylor Edwards
Audio and text by Kathy Jentz
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