Salvia × jamensis 'Emperor'

RHS Plant Profile

sage 'Emperor'

RHS / Joanna Kossak

Synonyms

Salvia greggii 'Emperor'
Salvia 'Emperor'

Herbaceous Perennial Shrubs

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A bushy, evergreen sub-shrub or woody-based perennial, to 60cm tall, with small, aromatic leaves and spikes of widely spaced, deep red-purple flowers from summer to late autumn

Position

Full sun, Partial shade

Soil Types

Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.5-1 metres

Growing Conditions

Loam Sand

Moisture: Moist but well–drained or Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun Partial shade

Aspect: South–facing or West–facing or East–facing
Exposure: Exposed or Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H4

Colour & Scent

Fragrance Foliage

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Lamiaceae
Native to GB/Ireland: No
Foliage: Semi evergreen
Habit: Bushy
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: Unresolved

How to Grow

Cultivation

Grow in light, moderately fertile, well-drained soil. Needs a sheltered position, but usually overwinters if given full sun and good drainage. Drought tolerant

Propagation

Propagate by basal cuttings or softwood cuttings in spring or early summer or semi-ripe cuttings in late summer or autumn with bottom heat

Suggested planting locations and garden types

Coastal
Mediterranean climate plants
City and courtyard gardens
Cottage and informal garden
Patio and container plants
Flower borders and beds
Wall side borders

Pruning

Pruning group 9 in spring; cut back spent flower spikes to prolong flowering

Pests

May be susceptible to sage leafhopper, slugs, snails and rosemary beetle

Diseases

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