Salvia Jemima's Gem ('Jemco') (Gem Series)

RHS Plant Profile

sage [Jemima’s Gem]

RHS / Norfolk Herbs

Synonyms

Salvia 'Jemco'

Herbaceous Perennial

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A shrubby, herbaceous perennial up to around 1m tall that produces velvety deep pinkish-red flowers from late spring into autumn

Position

Full sun

Soil Types

Clay, Loam, Sand

Max Height

0.5-1 metres

Max Spread

0.5-1 metres

Size

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

Growing Conditions

Clay Loam Sand

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

Position

Full sun

Aspect: South–facing or West–facing
Exposure: 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

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Lamiaceae
Native to GB/Ireland: No
Foliage: Deciduous
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: Trade

How to Grow

Cultivation

Grow in a well drained soil in full sun with shelter from cold, drying winds

Propagation

Propagate from softwood cuttings

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Gravel garden
Mediterranean climate plants
Patio and container plants
Flower borders and beds

Pruning

Cut back if required in late spring when the risk of frost has passed

Pests

Generally pest-free but may be susceptible to white fly, red spider mite and aphid attack

Diseases

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