Petrocallis pyrenaica
rock beauty
P. pyrenaica is a cushion-forming, evergreen perennial to 5cm, with dense rosettes of three-lobed, grey-green leaves. Small clusters of pink-purple, or white, vanilla-scented flowers appear in spring
Size
Ultimate height
Up to 10cmTime to ultimate height
2–5 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Purple White | Green Grey Silver | ||
|---|---|---|---|---|
| Summer | Green Grey Silver | |||
| Autumn | Green Grey Silver | |||
| Winter | Green Grey Silver |
Position
- Full sun
Aspect
South–facing or West–facing or East–facing
Exposure
Sheltered Hardiness
H7Botanical details
- Family
- Brassicaceae
- Native to the UK
- No
- Foliage
- Evergreen
- Habit
- Matforming
- Genus
Petrocallis are cushion-forming perennials with rosettes of lobed leaves and clusters of four-petalled flowers on short stems in spring
- Name status
Correct
- Plant range
- Europe (Mts)
How to grow
Cultivation
Requires poor, gritty, very well-drained soil in full sun. Intolerant of winter wet, so in many areas better grown in an alpine house
Propagation
Propagate by seed sown in a container in a cold frame in autumn, or by separating rosettes in early summer and rooting them as cuttings
Suggested planting locations and garden types
- City and courtyard gardens
- Rock garden
- Cottage and informal garden
- Gravel garden
- Patio and container plants
Pruning
No pruning required
Pests
Susceptible to aphids, glasshouse red spider mite and glasshouse whitefly if grown under cover
Diseases
Generally disease-free
Get involved
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