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Acaena pinnatifida var. californica (California sheepburr)

Beginner
skill rating
2 hours care
per year
0.3m
Max height
0.4m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Acaena pinnatifida var. californica

Other names

California sheepburr, California acaena

Genus

Acaena Acaena

Species

A. pinnatifida var. californica - A. pinnatifida var. californica is a creeping, evergreen perennial with pinnate leaves divided into elliptic, toothed, grey-green leaflets and, from early spring to early summer, stout stems bearing ovoid flowerheads with red stamens followed by spiny, four-angled fruit.


Acaena pinnatifida var. californica is: Evergreen

Habit

Creeping

Flower

Red in Spring; Red in Summer

Foliage

Grey-green in All seasons

How to care

Watch out for

Pests

Generally pest free

Diseases

Generally disease free

General care

Pruning

Cut back spent flower stems.

Propagation

Sow seed in a cold frame in autumn. Separate rooted stems in early spring or autumn.

Propagation methods

Seed, Softwood cuttings, Stem segments


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Where to grow

Acaena pinnatifida var. californica (California sheepburr) will reach a height of 0.3m and a spread of 0.4m after 2-5 years.

Suggested uses

Ground Cover, Gravel, Containers, Between paving stones, Banks and Slopes, Rock

Cultivation

Grow in moderately fertile, well-drained soil, in sun or partial shade.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Well-drained

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

Botanical name

Acaena pinnatifida var. californica

Other names

California sheepburr, California acaena

Genus

Acaena Acaena

Species

A. pinnatifida var. californica - A. pinnatifida var. californica is a creeping, evergreen perennial with pinnate leaves divided into elliptic, toothed, grey-green leaflets and, from early spring to early summer, stout stems bearing ovoid flowerheads with red stamens followed by spiny, four-angled fruit.

Foliage

Evergreen

Habit

Creeping


Colour

Flower

Red in Spring; Red in Summer

Foliage

Grey-green in All seasons


How to care

Watch out for

Pests

Generally pest free

Diseases

Generally disease free

General care

Pruning

Cut back spent flower stems.

Propagation

Sow seed in a cold frame in autumn. Separate rooted stems in early spring or autumn.

Propagation methods

Seed, Softwood cuttings, Stem segments


Monthly care advice


Where to grow

Acaena pinnatifida var. californica (California sheepburr) will reach a height of 0.3m and a spread of 0.4m after 2-5 years.

Suggested uses

Ground Cover, Gravel, Containers, Between paving stones, Banks and Slopes, Rock

Cultivation

Grow in moderately fertile, well-drained soil, in sun or partial shade.

Soil type

Chalky, Loamy, Sandy

Soil drainage

Well-drained

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 9, Zone 8, Zone 7

Defra's Risk register #1

Plant name

Acaena pinnatifida var. californica (California sheepburr)

Common pest name

grape ground pearl

Scientific pest name

Margarodes vitis

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)

5

General biosecurity comments

Main pathway; Vitis spp. plants for planting; already prohibited. However; further consideration of other pathways is required.

Defra's Risk register #2

Plant name

Acaena pinnatifida var. californica (California sheepburr)

Common pest name

Lance nematode; Nematode; Lance

Scientific pest name

Hoplolaimus spp.

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

Nematode species potentially affecting a wide variety of crops; prohibition of soil likely to mitigate risk substantially; keep under review in light of interceptions or findings should they occur in the EU.

Defra's Risk register #3

Plant name

Acaena pinnatifida var. californica (California sheepburr)

Common pest name

Scientific pest name

Orgyia thyellina

Type

Insect

Current status in UK

Absent

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

3

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

3

General biosecurity comments

Polyphagous moth pest from Eastern Asia which could be damaging to broadleaf and coniferous species if introduced to the UK; as well as having human health impacts. The main pathway is likely to be on goods (including non-plant material) imported from Eastern Asia and awareness raising with the main industry sectors is recommended.

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: Chalky, Loamy, Sandy Tell us...
Soil drainage: Well-drained 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...

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