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Herbaceous Perennial

Salvia nemorosa 'Schwellenburg'
  • RHS Plants for pollinators

Balkan clary 'Schwellenburg'

An upright, clump-forming deciduous perennial to 60cm, with grey-green leaves and feathery spikes of purple flowers during the summer and autumn

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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Sand
Loam
Moisture
Moist but well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green Grey Silver
Summer Purple Green Grey Silver
Autumn Purple Green Grey Silver
Winter
Position
  • Full sun
  • Partial shade
Aspect

East–facing or South–facing or West–facing

Exposure
Exposed or Sheltered
Hardiness
H6
Botanical details
Family
Lamiaceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus

Salvia can be annuals, biennials, herbaceous or evergreen perennials, or shrubs. They have paired, simple or pinnately lobed, often aromatic leaves and 2-lipped flowers in whorls, forming simple or branched spikes or racemes

Name status

Accepted

How to grow

Cultivation

Grow in light, moderately fertile, moist but well drained soil, in full sun or light dappled shade. Protect from excessive winter wet

Propagation

Propagate by division in spring, by basal or softwood cuttings in spring or early summer, or by semi-hardwood cuttings in late summer or autumn

Suggested planting locations and garden types
  • Coastal
  • Cottage and informal garden
  • Patio and container plants
  • Wildlife gardens
  • City and courtyard gardens
  • Gravel garden
  • Mediterranean climate plants
  • Flower borders and beds
Pruning

Cut back faded flower spikes to prolong flowering

Pests

May be susceptible to slugs and snails

Diseases

May be susceptible to honey fungus (rarely), powdery mildews, verticillium wilt and foot and root rots

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