Plectranthus argentatus

RHS Plant Profile

silver spurflower

RHS 2001

Synonyms

Plectranthus argentatus

Shrubs Bedding

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A spreading evergreen sub-shrub with densely hairy, silvery stems, grey-green leaves and small tubular bluish-white flowers in short racemes in summer

Position

Partial shade

Soil Types

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

Loam Sand

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

Position

Partial shade

Aspect: South–facing or West–facing or East–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): H1C

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Lamiaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: A genus of annual or perennial herbs or shrubs, some of which can be succulent or tuberous in nature, and one of the easiest plants to propagate. Their velvety leaves add vibrant shades of red, pink, green and purple to beds and borders, pots and containers
Name Status: Correct
Plant Range: Australia

How to Grow

Cultivation

Best grown in a well-drained soil in partial shade, used as foliage plant either in beds or in a container. Can be grown under glass but shade from hot sun

Propagation

Propagate by seed or semi-hardwood cuttings

Suggested planting locations and garden types

City and courtyard gardens
Coastal
Patio and container plants
Flower borders and beds

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free