General Plant Information (Edit)
Plant Habit: Grass/Grass-like
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 6a -23.3 °C (-10 °F) to -20.6 °C (-5 °F)
Plant Height: 6 - 8 feet
Plant Spread: 2 - 3 feet
Leaves: Evergreen
Flowers: Inconspicuous
Flower Color: Purple
Bloom Size: Under 1"
Flower Time: Summer
Late summer or early fall
Uses: Provides winter interest
Dried Flower
Propagation: Other methods: Division
Containers: Not suitable for containers
Awards and Recognitions: RHS AGM
Other: UC Davis Arboretum All Star

Image
Common names
  • Giant Oats
  • Spanish Oats
  • Giant Feather Grass
  • Giant Needle Grass
Also sold as:
  • Stipa gigantea

Photo Gallery
Location: All pictures taken in/on my gardens/greenhouse/property
Date: 2022-03-15
Location: Royal Botanic Gardens, Kew
Date: 2017-10-10
Location: RHS Harlow Carr, Yorkshire, UK
Date: 2018-08-05
Location: RHS Hyde Hall, Essex, UK.
Date: 2022-08-09
Location: Yorkshire Lavender Terrington
Date: 2018-07-05
Seen against a perfect blue summer sky
Location: Madrid, Spain | April, 2023
Date: 2023-04-08
Location: RHS Harlow Carr, Yorkshire, UK
Date: 2016-08-09
Location: Royal Botanic Gardens, Kew
Location: RHS Harlow Carr, Yorkshire, UK
Date: 2016-07-27
Location: My Garden Crescent City, California
Date: 2016-04-16

Photo Courtesy of Secret Garden Growers.
  • Uploaded by Joy
Location: My Garden Crescent City, California
Date: 2016-05-17
Location: My Garden Crescent City, California
Date: 2016-05-17
Location: Bide A Wee cottage garden, Northumberland, UK
Date: 2013-06-26
Location: My Garden Crescent City, California
Date: 2016-04-16
Location: My Garden Crescent City, California
Date: 2016-04-16
Location: My Garden Crescent City, California
Date: 2016-04-16
This plant is tagged in:
Image

Comments:
  • Posted by jmorth (central Illinois) on Mar 1, 2012 4:13 AM concerning plant:
    Received an RHS Award of Garden Merit.
    Magnificent grass.

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