Hypericum perforatum · Hypericaceae

St John's Wort

✅ Pet-friendlyPerennial life cycle, regenerates annually.30 to 60 cm

LightFull sun, tolerates shade

WaterLow

DifficultyEasy

ColdResistant to temperatures down to -10 degrees Celsius.

Full sun, tolerates shadeLowEasyResistant to temperatures down to -10 degrees Celsius.

Description & origin

St John's Wort is a perennial herb known for its bright yellow flowers. It is often used in traditional medicine and has anti-inflammatory properties.

Size

Reaches a height of 30 to 60 cm and a width of 30 to 50 cm.

Foliage

Leaves are opposite, oval, and glossy green.

Flowering

Blooms from June to September, with star-shaped yellow flowers.

Detailed care

Light

Prefers full sun but tolerates some shade.

Soil

Prefers well-drained, slightly acidic to neutral soils.

Watering

Requires low watering, avoiding waterlogging.

Temperature

Resistant to mild temperatures, tolerates cold well.

Fertilising

Fertilize once in spring with a balanced fertilizer.

Repotting

Transplant in spring when plants are actively growing.

Pruning

Can be pruned after flowering to encourage new growth.

Propagation

Easily propagated by seeds or cuttings.

Common problems

Pests

Can be affected by aphids and scale insects.

Fungal diseases

Susceptible to fungi in high humidity conditions.

Uncontrolled growth

Can become invasive if not controlled.

Uses & curiosities

In the garden

Ideal for borders and flower beds
Attracts pollinators like bees and butterflies
Used in infusions and as a medicinal plant

Other uses

Used in phytotherapy to treat emotional disorders.

Did you know…

This plant is associated with the summer solstice and is used in St John's celebrations. Its flowers are rich in compounds that may help treat mild depression.