Achnatherum calamagrostis

Silver Spike Grass - 2006 Plant of the Year

 
 
Achnatherum calamagrostis, Achnatherum calamagrostis, Silver Spike Grass

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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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Zones 5 - 8
Advantages
Easy to grow
Adds Texture
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 early September, coldest zones first. Buy now and we'll ship your order at the ideal planting time for your region. More shipping info Learn More…
Size Plant - 5" deep pot
SKU 10100
Award: Perennial Plant of the Year

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"
Advantages Easy to grow, Adds Texture
Special Groups High Country Gardens Exclusive, High Country Gardens Introduction
Ideal Region Western Only, Suitable Above 7000 ft, West, Pacific Northwest
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. Fall shipping begins the week of September 5, zones 3-4 first. Most plant orders arrive within 3-5 days, or less, of leaving our greenhouses. This prompt delivery is provided without additional express charges.

Grass Plugs & Seed: Most orders ship within 5-8 business days (all zones).

Gardening Goods:All non-plant items 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
 
4.0

(based on 7 reviews)

Ratings Distribution

  • 5 Stars

     

    (4)

  • 4 Stars

     

    (1)

  • 3 Stars

     

    (1)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (1)

86%

of respondents would recommend this to a friend.

Pros

  • Attractive (6)
  • Hardy (6)

Cons

No Cons

Best Uses

  • Garden (5)
  • Outdoors (3)
  • Pool area (3)
    • Reviewer Profile:
    • Avid gardener (3)
    • Primary use:
    • Personal (4)

Reviewed by 7 customers

Displaying reviews 1-7

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5.0

Excellent in Zone 6B

By 

from Walker Pass, California @ 4,800 elev.

About Me Professional Landscaper

Verified Reviewer

Pros

  • Attractive
  • Hardy
  • Versatile

Cons

    Best Uses

    • Garden
    • Outdoors
    • Patio
    • Pool Area

    Comments about High Country Gardens Achnatherum calamagrostis:

    Bloomed 2nd year, but bigger and better 3rd year. Very soft in the landscape. With a lot of movement in the slightest breeze. A wonderful addition to the dry garden with a long season of interest.

    • Primary use:
    • Personal
     
    5.0

    Beautiful!

    By 

    from WA

    Verified Reviewer

    Pros

    • Attractive
    • Hardy

    Cons

      Best Uses

        Comments about High Country Gardens Achnatherum calamagrostis:

        I planted these in March, and they woke up mid-April. They are now growing extremely strongly and happily. I love them already, and have high hopes for future seasons with this grass!

        (3 of 3 customers found this review helpful)

         
        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

            (3 of 3 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 1-7

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              Q & A

              Suggested Companion Plants:

              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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