Wall pellitory
Parietaria officinalis · Urticaceae
The gardener's calendar
Ideal time to plant wall pellitory: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous to semi-evergreen depending on climate
- Flowering
- Spring and summer (April to September)
- Adult size
- 12 to 24 inches in height
- Growth
- Fast
- Hardiness
- Moderate (zones 7-10)
- Origin
- Mediterranean basin and Central Europe
- Soil type
- Well-drained, chalky or neutral
Care
Light Exposure
Choose a sunny to partially shaded location. Pellitory of the wall tolerates partial shade but flowers more generously in good light. Avoid excessive exposure in very hot zones.
Watering
Keep the soil regularly moist during growth without allowing water to stagnate. Reduce watering in fall and winter. In containers, check substrate moisture and water as soon as the surface dries out.
Soil and Substrate
Plant in well-drained soil that is slightly chalky or neutral. Enrich the soil with organic matter (compost) at planting time. Poor drainage promotes root rot.
Fertilizing
Apply a balanced fertilizer when vegetative growth starts in spring. Moderate monthly fertilization during flowering strengthens vigor. Reduce or stop feeding in winter.
Pruning and Maintenance
Prune lightly in late winter to encourage branching and maintain a compact shape. Deadhead spent flowers to extend the blooming period. Remove weak or poorly positioned stems.
Diseases and Pests
Pellitory of the wall is generally hardy. Watch for powdery mildew in humid conditions and spider mites in dry conditions. Ensure good air circulation and avoid wetting the foliage when watering.
Did you know?
Pellitory of the wall was long used in traditional herbal medicine, notably by medieval apothecaries for its reputed diuretic properties. Its Latin name 'officinalis' directly refers to this ancient medicinal use. Today, it's also famous as a pioneer plant capable of colonizing cracks in old walls and building facades, earning it the poetic nickname 'plant of the ruins'.
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.
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Tips generated and checked by Viridia — adapt them to your local climate.