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Juncus patens 'Elk Blue' (California grey rush 'Elk Blue')

Beginner
skill rating
1 hour care
per year
0.6m
Max height
1m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Juncus patens 'Elk Blue'

Other names

California grey rush 'Elk Blue', California gray rush 'Elk Blue', Blue rush 'Elk Blue', Spreading rush 'Elk Blue'

Genus

Juncus Juncus

Variety or Cultivar

'Elk Blue' _ 'Elk Blue' is a clump-forming, rhizomatous, evergreen perennial with upright, leafless, grooved, blue-green stems and small clusters of brown flowers from spring into autumn.


Juncus patens 'Elk Blue' is: Deciduous

Habit

Clump-forming

Flower

Brown in Spring; Brown in Summer; Brown in Autumn

How to care

Watch out for

Pests

Generally pest-free

Diseases

Generally disease-free

General care

Pruning

Tidy by removing dead stems and any spent flowerheads in spring

Propagation methods

Division, Seed


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Where to grow

Juncus patens 'Elk Blue' (California grey rush 'Elk Blue') will reach a height of 0.6m and a spread of 1m after 2-5 years.

Suggested uses

Aquatic, Beds and borders, Bog garden, City, Containers, Cottage/Informal, Low Maintenance, Waterside

Cultivation

Prefers moist, acid soil in full sun but will tolerate a wide range of conditions. Relatively drought tolerant once established. Can be grown in shallow water at pond margins. May become invasive in ideal conditions.

Soil type

Clay, Loamy, Sandy

Soil drainage

Boggy damp conditions, Moisture-retentive, Pond/In water

Soil pH

Acid, 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

Juncus patens 'Elk Blue'

Other names

California grey rush 'Elk Blue', California gray rush 'Elk Blue', Blue rush 'Elk Blue', Spreading rush 'Elk Blue'

Genus

Juncus Juncus

Variety or Cultivar

'Elk Blue' _ 'Elk Blue' is a clump-forming, rhizomatous, evergreen perennial with upright, leafless, grooved, blue-green stems and small clusters of brown flowers from spring into autumn.

Foliage

Deciduous

Habit

Clump-forming


Colour

Flower

Brown in Spring; Brown in Summer; Brown in Autumn


How to care

Watch out for

Pests

Generally pest-free

Diseases

Generally disease-free

General care

Pruning

Tidy by removing dead stems and any spent flowerheads in spring

Propagation methods

Division, Seed


Monthly care advice


Where to grow

Juncus patens 'Elk Blue' (California grey rush 'Elk Blue') will reach a height of 0.6m and a spread of 1m after 2-5 years.

Suggested uses

Aquatic, Beds and borders, Bog garden, City, Containers, Cottage/Informal, Low Maintenance, Waterside

Cultivation

Prefers moist, acid soil in full sun but will tolerate a wide range of conditions. Relatively drought tolerant once established. Can be grown in shallow water at pond margins. May become invasive in ideal conditions.

Soil type

Clay, Loamy, Sandy

Soil drainage

Boggy damp conditions, Moisture-retentive, Pond/In water

Soil pH

Acid, 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 10, Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4, Zone 3

Defra's Risk register #1

Plant name

Juncus patens 'Elk Blue' (California grey rush 'Elk Blue')

Common pest name

Scientific pest name

Xiphinema bricolense

Type

Nematode

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

EU regulated nematode pest with the potential to introduce non-European viruses. EU listing and regulations on soil/growing material associated with planting material help to mitigate the risk of entry.

Defra's Risk register #2

Plant name

Juncus patens 'Elk Blue' (California grey rush 'Elk Blue')

Common pest name

Scientific pest name

Bactra bactrana

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

3

General biosecurity comments

Moth whose larvae feed on sedge and grass stems; found (in 2014) to be damaging glasshouse peppers in Greece. Industry may wish to monitor for its presence.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/

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This plant likes... Garden match
Soil types: Clay, Loamy, Sandy Tell us...
Soil drainage: Boggy damp conditions, Moisture-retentive, Pond/In water Tell us...
Soil pH: Acid, 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...

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