Achnatherum calamagrostis

Silver Spike Grass - 2006 Plant of the Year

 
 
Achnatherum calamagrostis, Achnatherum calamagrostis, Silver Spike Grass

Exclusive. 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.

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Regular Price: $11.99

Sale $9.59

per plant - 5" deep pot You save: 20%
Zones 5 - 8
Light Requirements
Full Sun
Full Sun
Annual Rainfall
Average
10 to 20", 20 to 30", 30 to 40", 40 to 50"
Ideal Region
Only in Western US
Shipping Shipping begins in late February based on ground temperatures, warmest zones first. Learn More…
Size Plant - 5" deep pot
SKU 10100

Details

36" tall x 36" wide (seed/division propagated). A spectacular European native, Achnatherum 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 for highly visible areas of your landscape.
SKU 10100
Common Name Silver Spike Grass - 2006 Plant of the Year
Botanical Name Achnatherum calamagrostis
Zones 5, 6, 7, 8
Light Requirements Full Sun
Mature Height 36" tall
Mature Spread 36" wide
Ships As Potted Plant
Planting Time Spring / Summer, Fall
Soil Type Clay Soil, Sandy Soil, Average Soil
Soil Moisture Average
Amount of Rain 10 to 20", 20 to 30", 30 to 40", 40 to 50"
Special Groups High Country Gardens Exclusive, High Country Gardens Introduction
Ideal Region Western Only, Suitable Above 7000 ft
Neonicotinoid-Free Yes - Learn More
Ships to Hawaii, Alaska & Canada No

Planting Guides

View more Planting Guides, or download our complete Planting Guide for tips on caring for your plants when you receive your order, as well as planting instructions for Perennials, Spring-Planted Bulbs, Fall-Planted Bulbs, Cacti & Succulents, Xeric Plants and more.

Shipping

Plant Shipping: Buy now and we will ship your order at the ideal planting time for your region. Spring-Planted Perennial and Bulb orders will ship from February 27-June 30, warmest zones first. Most plant orders will arrive within 3-4 days, or less, of leaving our greenhouses. This prompt delivery is provided without additional express charges.

Grass Plugs Will ship at planting time in spring 2017, beginning in late February.

Wildflower Seed & Grass Seed Orders ship within 2-3 days.

Standard shipping costs are $4.99 and up, depending on the size of the order.

Make Fast Even Faster: For ‘Rush’ same week delivery, please call customer service at 800-925-9387.

More Shipping Info

Reviewsby PowerReviews

REVIEW SNAPSHOT®

by PowerReviews
High Country GardensAchnatherum calamagrostis
 
3.6

(based on 5 reviews)

Ratings Distribution

  • 5 Stars

     

    (2)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

80%

of respondents would recommend this to a friend.

Pros

  • Attractive (4)
  • Hardy (4)

Cons

No Cons

Best Uses

  • Garden (4)
    • Reviewer Profile:
    • Avid gardener (3)
    • Primary use:
    • Personal (3)

Reviewed by 5 customers

Displaying reviews 1-5

Back to top

 
1.0

These didn't survive

By 

from Boise, Idaho

Pros

  • No Idea They Didn't Live

Cons

  • Did Not Survive Winter

Best Uses

    Comments about High Country Gardens Achnatherum calamagrostis:

    These didn't live.

     
    5.0

    Nice airy grass

    By 

    from Littleton, CO

    About Me Master Gardener

    Verified Reviewer

    Pros

    • Attractive
    • Hardy

    Cons

      Best Uses

      • Garden

      Comments about High Country Gardens Achnatherum calamagrostis:

      This grass has a nice light texture. I have it planted in a pot that is sunk halfway in the ground with its bottom cut off. So far its been hardy enough to survive those conditions and it looks really nice.

      • Primary use:
      • Personal
       
      4.0

      Slow starter?

      By 

      from El Dorado, Kansas

      About Me Avid Gardener

      Pros

      • Accurate Instructions
      • Attractive
      • Hardy
      • Healthy

      Cons

      • Small In Size

      Best Uses

      • Garden
      • Outdoors

      Comments about High Country Gardens Achnatherum calamagrostis:

      Not asmuch growth as I wcpected this year and no blooms. Still healthy.

      (2 of 2 customers found this review helpful)

       
      3.0

      Slow But Growing

      By 

      from Rio Rico, AZ

      About Me Avid Gardener

      Pros

      • Attractive
      • Hardy
      • Nicely Shaped Grass

      Cons

      • Slow growing

      Best Uses

      • Garden
      • Outdoors
      • Pool Area
      • With Other Grasses

      Comments about High Country Gardens Achnatherum calamagrostis:

      Bought these to plant under eucalyptus trees. They seem to be a lot slower growing & 'blossoming' than I hoped for, but they have a nice shape & are not invasive.

      • Primary use:
      • Personal

      (2 of 2 customers found this review helpful)

       
      5.0

      High Desert Grassland

      By 

      from Central Oregon/Prineville

      About Me Avid Gardener

      Pros

      • Attractive
      • Hardy
      • Healthy
      • Lightweight

      Cons

        Best Uses

        • Garden
        • Patio
        • Pool Area

        Comments about High Country Gardens Achnatherum calamagrostis:

        Lovely profile, especially combined with Karl Forster. The coloring is delicate, and the effect is especially pleasing in a breeze. We use this among fescue,other calamogrostis plants and kinnickinnick in a rocky native planting.

        • Primary use:
        • Personal

        Displaying reviews 1-5

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        Q & A

        USDA Hardiness Planting Zones

        To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.

        • If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
        • If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).

        Find Your Planting Zone:

        Enter your Zip Code to find your USDA Planting Zone

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