Hypericum calycinum · Hypericaceae

St. John's Wort

✅ Pet-friendlyPerennial life cycle, with annual flowering.30 to 60 cm

LightFull sun

WaterLow

DifficultyEasy

ColdResistant down to -10 degrees Celsius.

Full sunLowEasyResistant down to -10 degrees Celsius.

Description & origin

St. John's Wort is a perennial shrub known for its vibrant yellow flowers. This plant is quite resilient and adapts well to different soil conditions.

Size

Reaches a height of 30 to 60 cm, with a width of 60 to 90 cm.

Foliage

Dark green leaves, opposite, that remain year-round.

Flowering

Blooms in summer, producing star-shaped yellow flowers.

Detailed care

Light

Prefers full sun but tolerates some shade.

Soil

Adapts to various soil types as long as well-drained.

Watering

Requires low watering, tolerates dry periods.

Temperature

Resistant to mild temperatures, tolerates moderate cold.

Fertilising

Fertilize once a year with a balanced fertilizer in spring.

Repotting

Transplant in spring or autumn, ensuring the soil is well prepared.

Pruning

Light pruning after flowering to maintain shape.

Propagation

Can be propagated by cuttings or division of clumps.

Common problems

Aphid infestations

Aphids can infest the plant, causing damage to the leaves.

Fungal diseases

May be susceptible to fungi in overly humid conditions.

Leaf yellowing

Can occur due to overwatering or lack of nutrients.

Uses & curiosities

In the garden

Ideal for borders and flower beds
Attracts pollinators like bees and butterflies
Used in Mediterranean-style gardens

Other uses

Can be used in medicinal infusions.

Did you know…

The flowers of St. John's Wort are used in traditional medicine to treat depression. It is highly valued in gardening for its abundant flowering.