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Phormium tenax 'All Black' (New Zealand flax 'All Black')

Beginner
skill rating
1 hour care
per year
2m
Max height
2.5m
Max spread
2-5 years
To maturity

Plant details

Botanical name

Phormium tenax 'All Black'

Other names

New Zealand flax 'All Black'

Genus

Phormium Phormium

Variety or Cultivar

'All Black' _ 'All Black' is a large, clump-forming, evergreen perennial with rigid, linear, upright, purple-black leaves and panicles of tubular, dull red flowers in summer.


Phormium tenax 'All Black' is: Evergreen

Habit

Clump-forming, Upright

Flower

Red in Autumn

Foliage

Black, Purple in All seasons

How to care

Watch out for

Specific pests

Phormium mealybug Phormium mealybug

Diseases

Generally disease free.

General care

Propagation methods

Division


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Where to grow

Phormium tenax 'All Black' (New Zealand flax 'All Black') will reach a height of 2m and a spread of 2.5m after 2-5 years.

Suggested uses

Architectural, City, Coastal, Beds and borders, Gravel, Low Maintenance

Cultivation

Grow moist, well-drained, fertile soil in full sun, will also tolerate partial shade. Foliage may be damaged by cold winds and hard frosts. Cut back the flower stalks to the base after they have finished.

Soil type

Sandy, Loamy

Soil drainage

Well-drained, Moist but well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

North, South, East, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Tender in frost (H3), Hardy (H4)

Companion plants

We do not currently have companion plants added for this plant.

Botanical name

Phormium tenax 'All Black'

Other names

New Zealand flax 'All Black'

Genus

Phormium Phormium

Variety or Cultivar

'All Black' _ 'All Black' is a large, clump-forming, evergreen perennial with rigid, linear, upright, purple-black leaves and panicles of tubular, dull red flowers in summer.

Foliage

Evergreen

Habit

Clump-forming, Upright


Colour

Flower

Red in Autumn

Foliage

Black, Purple in All seasons


How to care

Watch out for

Specific pests

Phormium mealybug

Diseases

Generally disease free.

General care

Propagation methods

Division


Monthly care advice


Where to grow

Phormium tenax 'All Black' (New Zealand flax 'All Black') will reach a height of 2m and a spread of 2.5m after 2-5 years.

Suggested uses

Architectural, City, Coastal, Beds and borders, Gravel, Low Maintenance

Cultivation

Grow moist, well-drained, fertile soil in full sun, will also tolerate partial shade. Foliage may be damaged by cold winds and hard frosts. Cut back the flower stalks to the base after they have finished.

Soil type

Sandy, Loamy

Soil drainage

Well-drained, Moist but well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

North, South, East, West

Exposure

Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Tender in frost (H3), Hardy (H4)

USDA zones

Zone 11, Zone 10, Zone 9, Zone 8

Defra's Risk register #1

Plant name

Phormium tenax 'All Black' (New Zealand flax 'All Black')

Common pest name

Australian grapevine yellows; Australian lucerne yellows; Australian yellows of grapevine

Scientific pest name

Candidatus Phytoplasma australiense'

Type

Phytoplasma

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

Phytoplasma present in Australia and New Zealand which could be damaging to grapevine and strawberry production; in particular; if introduced to the UK. EU regulations help to mitigate the risk of entry.

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: Sandy, Loamy Tell us...
Soil drainage: Well-drained, Moist but well-drained Tell us...
Soil pH: Acid, Alkaline, Neutral Tell us...
Light: Partial Shade, Full Sun Tell us...
Aspect: North, South, East, West Tell us...
Exposure: Sheltered Tell us...
Hardiness: Tender in frost (H3), Hardy (H4) Tell us...

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