Crocus speciosus 'Conqueror' (Large autumn crocus 'Conqueror')

Botanical name

Crocus speciosus 'Conqueror'

Other names

Large autumn crocus 'Conqueror', Bieberstein's crocus 'Conqueror'

Genus

Crocus Crocus

Variety or Cultivar

'Conqueror' _ 'Conqueror' is a compact, clump-forming, deciduous perennial with linear to narrowly strap-shaped, mid- to dark green leaves and goblet-shaped, deep blue flowers blooming in autumn before the leaves emerge.

Native to

Garden origin

Foliage

Deciduous

Habit

Clump-forming, Compact, Erect

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Colour

Flower

Blue in Autumn

Foliage

Dark-green in Autumn

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How to care

Watch out for

Specific pests

Mice , Squirrels , Voles

Diseases

Generally disease free

General care

Propagation methods

Seed

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Monthly care advice

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Where to grow

Crocus speciosus 'Conqueror' (Large autumn crocus 'Conqueror') will reach a height of 0.15m and a spread of 0.05m after 2-5 years.

Suggested uses

Banks and Slopes, Beds and borders, City, Containers, Cottage/Informal, Gravel, Low Maintenance, Naturalised in turf, Rock

Cultivation

Grow in gritty, poor to moderately fertile soil.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

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

Defra's Risk register #1

Plant name

Crocus speciosus 'Conqueror' (Large autumn crocus 'Conqueror')

Common pest name

common blossom thrips; cotton bud thrips; tomato thrips

Scientific pest name

Frankliniella schultzei

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

Polyphagous glasshouse pest; present in many countries; single finding in UK.

Defra's Risk register #2

Plant name

Crocus speciosus 'Conqueror' (Large autumn crocus 'Conqueror')

Common pest name

Eelworm; potato; Eelworm; potato tuber; Iris nematode; Nematode; potato rot; Potato root nematode; Potato tuber nematode

Scientific pest name

Ditylenchus destructor

Type

Nematode

Current status in UK

Present (Unknown Distribution)

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

1

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

3

General biosecurity comments

EU regulated polyphagous nematode pest present in parts of the UK. Marketing schemes and good practice help to reduce impacts

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