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How to grow and care for St. John's Wort plants


This plant grows best with full sun for most of the dayThis plant requires or will tolerate shade during the heat of the dayThis plant will tolerate some drought, but benefits from periodic wateringOnce established this plant requires little or no supplemental wateringNo DeerYellow flowering plantA photograph is availableHow to Use the Plant Care Icons at The Garden Helper
St. John's Wort, also known as Aaron's Beard, is a great plant
for hot, dry locations with poor soil.

There are over 400 species of Hypericum that includes annuals, perennials, shrubs and 10 ft. trees. They are vigorous growers which in some cases, can be invasive, but they are an excellent plant for erosion control, as a ground cover, in rock gardens or for border plantings.
St. John's Wort produces long lasting, bright yellow flowers with prominent gold stamens from mid summer until mid fall.
Once established, these deer resistant and durable plants can tolerate neglect, drought, and poor soils.
Many species make good seaside plants, due to their tolerance of salts.
The low growing Hypericum calycinum is commonly grown as a ground cover and will grow 18 inches tall, and spread 15-24 inches.
Shrub forms can grow from 1-5 ft. tall and wide.
Angoor the Garden Gnome

Planting and Growing St. John's Wort

Depending on the individual species, St. John's Wort may survive in USDA hardiness zones from 3-10.
St. John's Wort should be grown in a spot where they will receive full sun or partial to light shade.
Plant them in average to fertile, well draining garden soil.
Prune back hard in the spring to maintain a compact growth.
St. John's Wort are succeptible to damage from Rust infections, Scale insects and Thrips.

Propagating St. John's Wort Plants

St. John's Wort plants are fairly easy to propagate with softwood cuttings taken during the summer months.

St. John's Wort seeds can be sown directly in the garden in the spring or summer, up until two months before the first killing frost.
Seeds can also be started indoors.
Maintain a temperature of 70° within the growing medium.
Germination takes 25-30 days.
Herbal and Medicinal uses of St. John's Wort plants

The Flower of a St. John's Wort Plant, Hypericum calycinum
St. John's Wort
Hypericum calycinum
Hardy in zones 6-10
A Creeping St. John's Wort Growing in the Garden, Hypericum cerastoides
Creeping St. John's Wort
Hypericum cerastoides
Hardy in zones 6-9
A Variegated St. John's Wort Plant in Bloom, Hypericum moseranum
Variegated St. John's Wort
Hypericum moseranum
Hardy in zones 7-10

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