Botanical Name: Calamagrostis x acutiflora 'Overdam'
Common Name: Overdam Reed Grass  
Plant photo of: Calamagrostis x acutiflora 'Overdam'
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Water Saving Tip:

Group plants in your garden according to their water needs (hydrozone).

  • Anatomy

  • Culture

  • Design

Plant Type

Perennial, Grass


Height Range

1-3', 3-6'


Flower Color

Gold, Red


Flower Season

Spring, Summer, Fall


Leaf Color

Green, White, Yellow, Variegated


Bark Color



Fruit Color



Fruit Season



Full, Half



Medium, Extra in Summer


Growth Rate



Soil Type

Sandy, Clay, Loam, Rocky, Unparticular


Soil Condition

Average, Poor, Well-drained


Soil pH



Adverse Factors


Design Styles

English Cottage, Formal, Meadow, Mediterranean, Ranch, Seascape, Spanish, Native Garden


Accenting Features

Showy Flowers, Specimen


Seasonal Interest

Winter, Spring, Summer, Fall


Location Uses

Entry, Perennial Border, Foundation, Parking Strip, Patio, Park, Walls / Fences


Special Uses

Mass Planting, Small Spaces


Attracts Wildlife


Information by: Stephanie Duer
  • Description

  • Notes

Overdam is a wonderful ornamental grass for small spaces. It has an upright and slightly arching habit, with clumps 18 to 24 inches tall, topped by oaty plumes up to 4 feet. Blades are green with a cream to yellow margin. Plumes are oat-like, emerging reddish brown in late spring, and turning golden to buff in the fall.
Grows in full sun, and tolerates shady morning/late-day sun conditions. Grows in any well-drained soil. Cut back in late winter or early spring, before new growth emerges.