Leptinella squalida 'Platt's Black'

RHS Plant Profile

leptinella 'Platt's Black'

RHS

Synonyms

Cotula 'Platt's Black'
Leptinella minima 'Platts Black'
Leptinella potentillina 'Platts Black'
Leptinella 'Platt's Black'
Leptinella pusilla 'Platt's Black'

Alpine Rockery

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'Platt's Black' is a low, mat-forming perennial with small, fern-like leaves that are bronzy-black with green tips. Insignificant yellowish-green flowers appear in summer

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, Loam, Sand

Max Height

Up to 10 cm

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: Up to 10 cm

Growing Conditions

Chalk Clay Loam Sand

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

Position

Full sun Partial shade

Aspect: South–facing or North–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): H5

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asteraceae
Native to GB/Ireland: No
Foliage: Semi evergreen
Habit: Matforming
Genus: Leptinella are annuals and creeping, tufted or mat-forming perennials, forming low carpets of finely-divided, often aromatic, fern-like leaves. Button-like flowerheads on short stalks appear from late spring to summer
Name Status: Accepted

How to Grow

Cultivation

Grow in soil that is well-drained but does not dry out, in a sunny or semi-shaded position. Good on walls or between paving but aggressive spreading means it has potential to become a nuisance in more open spaces

Propagation

Propagate by division in spring

Suggested planting locations and garden types

City and courtyard gardens
Gravel garden
Patio and container plants
Cottage and informal garden
Low Maintenance
Garden edging
Ground cover
Underplanting of roses and shrubs

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free