Fine Herbs

St. John's Wort

Hardy perennial St. John's Wort with green foliage and bright yellow flowers in summer, valued for medicinal gardens, naturalistic borders, and low-maintenance edging.

Size

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Hardiness 3 to 8
Difficulty level Easy

Discover the plant

St. John's Wort

Hardy perennial St. John's Wort with green foliage and bright yellow flowers in summer, valued for medicinal gardens, naturalistic borders, and low-maintenance edging.
FamilyHypericaceae

St. John's wort is a perennial medicinal and ornamental plant appreciated for its bright yellow flowers, which bring a beautiful sunny touch to flowerbeds, herb gardens, naturalized borders, and rustic landscapes. Its green foliage, flexible habit, and star-shaped flowers create a very decorative natural effect, while attracting pollinators to the garden. Easy to integrate into sunny areas, it is well suited for meadow-style gardens, rockeries, and areas where a robust and characterful plant is desired.

Easy to grow, St. John's wort prefers a location in full sun or partial shade, in well-drained, light to moderately fertile soil. Once established, it tolerates drier conditions quite well and requires little maintenance, making it an excellent plant for sustainable gardens and low-maintenance landscapes. Light pruning after flowering or at the beginning of the season can help maintain a more compact, well-branched, and more floriferous plant.

Traditionally recognized as a medicinal plant, St. John's wort is mainly cultivated for its botanical interest, its vibrant flowering, and its ability to attract biodiversity. Its yellow flowers combine very well with grasses, yarrows, salvias, coneflowers, lavenders, and other sun-loving perennials. It is an ideal plant to add color, texture, and a natural touch to a medicinal garden, a flowering border, or a sunny landscape.

St. John's Wort

Soil and care

The rightconditions.

Soil pH Neutral to slightly alkaline
Fertilization Light compost in spring; light to moderate fertilization
Care level Easy
Seasonal care
Prune lightly after flowering to maintain a compact shape; cut back dry stems in spring; avoid waterlogged soils

Container growing

A controlledenvironment.

Can be grown in a well-drained pot
St. John's Wort

Bloom and dimensions

The completeprofile.

Bloom periodSummer
Flower colorYELLOW
Foliage colorGreen
Foliage typeObsolete
FruitingSeed pods at the end of the season
Maximum height18 to 36 inches (45 to 90 cm)
Maximum width45 to 60 cm (18 to 24 inches)
Growth rateAverage growth
Hardiness zone3 to 8
Minimum temperature-30°C
St. John's Wort

Garden associations

What to plantwith it.

Medicinal garden, natural bed, border, wildflower meadow, pollinator garden