Calamagrostis × acutiflora 'Overdam' (v)

RHS Plant Profile

feather reed grass 'Overdam'

Synonyms

Calamagrostis 'Overdam'

Grass Like

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'Overdam' is a compact tufted grass forming a clump of narrow, yellow to cream-striped leaves, with airy purplish sprays of flower becoming pale brown in winter

Position

Full sun, Partial shade

Soil Types

Chalk, Clay, 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

Chalk Clay Loam Sand

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

Position

Full sun Partial shade

Aspect: East–facing or South–facing or North–facing or West–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): H6

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Poaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Bushy
Genus: Calamagrostis are robust rhizomatous perennial grasses, forming tufts of linear leaves, with erect stems bearing dense branching flowering panicles in summer
Name Status: Accepted

How to Grow

Cultivation

Easy to grow in most moist, humus-rich, well-drained fertile soils, but will tolerate all but the poorest soils

Propagation

Propagate by division in mid-spring

Suggested planting locations and garden types

Patio and container plants
Architectural
Cottage and informal garden
Flower borders and beds
Banks and slopes

Pruning

Cut back old stems to the ground in early spring before growth resumes

Pests

Generally pest-free

Diseases

May be susceptible to a rust