Beginner
skill rating
Online Garden Tools
Useful videos
Calamagrostis porteri subsp. insperata (Porter's reedgrass)
Comment on a listing
Plant supplier links
- Login to upload a photo
1 hour care
per year
per year
0.9m
Max height
Max height
0.6m
Max spread
Max spread
2-5 years
To maturity
To maturity
Plant details
Botanical name
Calamagrostis porteri subsp. insperata
Other names
Porter's reedgrass, Calamagrostis insperata, Reed bentgrass
Genus
Calamagrostis Calamagrostis
Species
C. porteri subsp. insperata - C. porteri subsp. insperata is a clump-forming, deciduous, perennial grass with broadly linear, mid-green leaves and, from summer to early autumn, panicles of yellow-green flower spikelets turning creamy-white with age.
Calamagrostis porteri subsp. insperata is: Deciduous
Habit
Clump-forming
Flower
Yellow-green in Summer; Cream, Yellow-green in Autumn
Foliage
Mid-green in Spring; Mid-green in Summer; Mid-green in Autumn
How to care
Watch out for
Rust Rust
General care
Pruning
Cut back old stems to the ground in early spring before growth resumes.
Propagation methods
Division
Sign up for your FREE ACCOUNT today or login to receive detailed monthly care instructions
Where to grow
Calamagrostis porteri subsp. insperata (Porter's reedgrass) will reach a height of 0.9m and a spread of 0.6m after 2-5 years.
Suggested uses
City, Cottage/Informal, Beds and borders, Low Maintenance, Architectural, Prairie planting, Foliage only
Cultivation
Grow in moist soil in full sun or partial shade.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained, Moisture-retentive
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
South, East, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Calamagrostis porteri subsp. insperata
Other names
Porter's reedgrass, Calamagrostis insperata, Reed bentgrass
Genus
Calamagrostis Calamagrostis
Species
C. porteri subsp. insperata - C. porteri subsp. insperata is a clump-forming, deciduous, perennial grass with broadly linear, mid-green leaves and, from summer to early autumn, panicles of yellow-green flower spikelets turning creamy-white with age.
Native to
Eastern United States
Foliage
Deciduous
Habit
Clump-forming
Create your free Shoot garden
Create your free SHOOT garden and make a record of the plants in your garden.
Add your own photos, notes, get monthly email reminders on how to care for your plants, and connect with other gardeners. Get started now.
Colour
Flower
Yellow-green in Summer; Cream, Yellow-green in Autumn
Foliage
Mid-green in Spring; Mid-green in Summer; Mid-green in Autumn
How to care
Watch out for
Specific diseases
General care
Pruning
Cut back old stems to the ground in early spring before growth resumes.
Propagation methods
Division
Monthly care advice
Get access to monthly care advice
Create a free SHOOT account and get instant access to expert care advice for this and other plants in your garden.
You'll also receive handy monthly email reminders of what needs doing. Create your free account.
Where to grow
Calamagrostis porteri subsp. insperata (Porter's reedgrass) will reach a height of 0.9m and a spread of 0.6m after 2-5 years.
Suggested uses
City, Cottage/Informal, Beds and borders, Low Maintenance, Architectural, Prairie planting, Foliage only
Cultivation
Grow in moist soil in full sun or partial shade.
Soil type
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Soil drainage
Moist but well-drained, Moisture-retentive
Soil pH
Acid, Alkaline, Neutral
Light
Partial Shade, Full Sun
Aspect
South, East, West
Exposure
Exposed, Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Hardy (H4)
USDA zones
Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Chalky, Clay, Loamy, Sandy (will tolerate most soil types) | Tell us... |
| Soil drainage: | Moist but well-drained, Moisture-retentive | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Partial Shade, Full Sun | Tell us... |
| Aspect: | South, East, West | Tell us... |
| Exposure: | Exposed, Sheltered | Tell us... |
| Hardiness: | Hardy (H4) | Tell us... |
Report content or feedback to Shoot
To add ? to your lists,
login to your account or subscribe.
Find out more about plant lists here
or Login
To add notes for this plant login to your account or register for a new account.
Sign up for freeor Login
To add images for this plant login to your account or register for a new account.
Sign up for freeor Login
To check if this plant is suitable for your garden first login to your account or subscribe.
or Login