My garden, alive in my pocket.
Track my garden
🌿

Hornungia petraea

Hornungia petraea · Brassicaceae

The gardener's calendar

The right move for September

Ideal time to plant hornungia petraea: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.

JFMAMJJASOND Planting

ID card

Common name
Stone Hornungia
Family
Brassicaceae
Type
Annual herbaceous plant
Adult size
10 to 20 cm in height
Flowering
Spring (April to June)
Foliage
Deciduous
Hardiness
Very hardy (down to -15°C)
Origin
Rocky regions of central and southern Europe

Care

Exposure

Hornungia petraea prefers a sunny or semi-shaded location. This rock-loving plant appreciates bright spots that encourage abundant flowering. Avoid dense shade, which would slow its growth.

Soil

Choose very well-draining, poor to average soil, preferably stony or rocky. This species adapts perfectly to chalky and rocky soils. Excessive amendments are unnecessary and may weaken the plant.

Watering

Water moderately, especially during active growth periods in spring. Once established, the plant tolerates drought well and requires little maintenance. Avoid excess moisture, which could promote rot.

Fertilization

No fertilizer is necessary for this hardy plant. Hornungia petraea is used to poor soils and thrives with minimal conditions. Rich soil can compromise its natural vigor.

Pruning and cleanup

No regular pruning is required. A simple cleanup in late winter removes dry parts. This small, compact plant doesn't spread excessively and needs little intervention.

Diseases and pests

Very few problems reported. Like many rock plants, it resists common diseases well. Maintain good drainage to avoid any risk of root rot.

Did you know?

Hornungia petraea is a very discreet species that botanists long confused with other small rocky brassicas. It naturally grows on limestone rocks of Mediterranean cliffs and southwestern European regions, where it flowers in tiny white blossoms barely visible to the eye. Its name 'petraea' literally means 'of the stones,' highlighting its characteristic rocky habitat.

Where to buy it

Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.

Add this plant to my garden →

Plants from the same family

Browse all plants →

Tips generated and checked by Viridia — adapt them to your local climate.