Hypericum perforatum · Hypericaceae

St John's Wort

⚠️ Not safe for petsPerennial, remaining green throughout the year.30 to 60 cm

LightFull sun

WaterModerate, allow to dry between waterings

DifficultyEasy

ColdWithstands light frosts down to minus 5 degrees Celsius.

Full sunModerate, allow to dry between wateringsEasyWithstands light frosts down to minus 5 degrees Celsius.

Description & origin

St John's Wort is a perennial plant known for its vibrant yellow flowers. It is often used in gardens for its resilience and medicinal properties. It thrives in full sun and adapts to various soil types.

Size

Remains compact, ideal for borders and mass plantings.

Foliage

Evergreen foliage that remains green throughout the year.

Flowering

Blooms abundantly in summer with bright yellow flowers.

Detailed care

Light

Prefers full sun for healthy growth.

Soil

Adapts well to well-drained and slightly acidic soils.

Watering

Moderate watering, allowing the soil to dry slightly between waterings.

Temperature

Tolerates cold well but prefers temperate climates.

Fertilising

Fertilize in spring with a balanced fertilizer to promote flowering.

Repotting

Transplant in spring or autumn, avoiding extreme heat periods.

Pruning

Prune after flowering to maintain shape and encourage new growth.

Propagation

Easily propagated by cuttings or division of clumps in spring.

Common problems

Rust

Can be affected by rust, causing spots on leaves.

Powdery mildew

Powdery mildew may appear in high humidity conditions.

Root rot

Excess water can lead to root rot.

Uses & curiosities

In the garden

Borders
Mass plantings
Herb gardens

Other uses

Used in herbal medicine to treat mild depression.

Did you know…

This plant is traditionally used to treat mild depression and anxiety. Its medicinal properties have been recognized for centuries.