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.
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Exposure
Full sun
Hardiness
3 to 8

Discover the plant

Common nameSt. John's Wort
FamilyHypericaceae
TypeMedicinal perennial
Botanical nameSt John's Wort

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

Planting guide

From planting to establishment.

Propagation Sowing, division or cuttings

Soil and care

The right care,at the right time.

Soil pH

Neutral to slightly alkaline

Minimum temperature

-30°C

Care level

Easy

Watering

Moderate

Soil type

Light to medium soil, poor to fertile and well-drained

Fertilization

Light compost in spring; light to moderate fertilization

Moisture

Low to medium humidity; tolerates slightly dry soil once established

Seasonal care

Prune lightly after flowering to maintain a compact shape; cut back dry stems in spring; avoid waterlogged soils

Container growing

A garden,within reach.

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

Bloom and dimensions

Its place,in your garden.

Mature height

18 to 36 inches (45 to 90 cm)

Width / spread

45 to 60 cm (18 to 24 inches)

Flower color

YELLOW

Foliage color

Green

Foliage type

Obsolete

Growth rate

Average growth

Bloom period

Summer

Fruiting

Seed pods at the end of the season

Harvest

Flowers in summer
St. John's Wort

Garden associations

In goodcompany.

Companion plants

Yarrows, lavender, sage, coneflowers

Plants to avoid

Avoid with weak or shade-sensitive climbing plants

Wildlife and pets

Life,around your plants.

Supporting wildlife

Bees, pollinating insects