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Silver Spike Grass

Achnatherum calamagrostis
SKU: HC016081
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Exclusive. Achnatherum calamagrostis (Silver Spike Grass) is an outstanding Old World species grown for its late spring display of silver-green flower spikes. The seed heads age to tawny brown and hold on the plant into the fall. Drought Resistant/xeric. Introduced into cultivation in the US by Lauren Springer Ogden. 2006 Plant of the Year.
key features
Botanical Name
Achnatherum calamagrostis
Easy To Grow
Growing Zones
Zone 5, Zone 6, Zone 7, Zone 8
Light Requirements
Full Sun
Soil Moisture
Mature Height
36" tall
Mature Spread
36" wide


A spectacular European native, Achnatherum calamagrostis (Silver Spike Grass) is both a graceful and free-flowering summer blooming ornamental grass. It will beautify your garden with its showy, silver-green flowering spikes that turn a rich tawny brown in the fall. For best garden performance Silver Spike Grass should be grown in the western US (and other higher altitude areas of the country) where summer humidity is low and nights are cool. Seed of this grass comes to us by way of Lauren Springer Ogden, who has pioneered the use of it in this country by successfully cultivating it in CO for over 8 years. Achnatherum is sure to be extremely popular as it is a distinctive, specimen-worthy species with highly visible areas of your landscape.  Flat of 9 plants will cover 30 square feet when planted together. 36" tall x 36" wide (seed/division propagated). 2006 Plant of the Year.
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