Chrysanthemum 'Rystar' (Chrysanthemum 'Rystar')

Botanical name

Chrysanthemum 'Rystar'

Other names

Chrysanthemum 'Rystar', Dendranthema 'Rystar'

Genus

Chrysanthemum Chrysanthemum

Variety or Cultivar

'Rystar' _ 'Rystar' is a tender perennial with an upright habit. Its divided foliage is dark-green. In late autumn it bears single, deep-yellow flowers with yellow-green disks.

Foliage

Deciduous

Fragrance

Leaves are aromatic.

Habit

Upright

Awards

RHS AGM (Award of Garden Merit)

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Colour

Flower

Yellow-green, Dark-yellow in Autumn

Foliage

Dark-green in Spring; Dark-green in Summer; Dark-green in Autumn

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How to care

Watch out for

Specific pests

Aphids , Capsid bug , Eelworms (leaf and bud) , Glasshouse red spider mite , Glasshouse whitefly

Diseases

In addition to these diseases, a virus may cause stunting and leaf markings.

Specific diseases

Powdery mildew , Chrysanthemum white rust , Grey mould

General care

Pruning

Pinch out the growing tips to encourage bushy plants and disbud as required.

Propagation methods

Softwood cuttings

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Monthly care advice

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Where to grow

Chrysanthemum 'Rystar' (Chrysanthemum 'Rystar') will reach a height of 1m and a spread of 0.5m after 1-2 years.

Suggested uses

Containers, Flower Arranging, Indoor

Cultivation

Grow in a cold frame in a loam-based potting compost before moving into a warm glasshouse in early autumn(min temp of 10 °C). Provide bright filtered light with good ventilation. During growing season water and apply a balanced liquid fertilizer.

Soil type

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

Soil drainage

Well-drained, Moist but well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Full Sun

Aspect

North, South, East, West

Exposure

Sheltered

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

Indoor heated (H1), Indoor unheated (H2)

Defra's Risk register #1

Plant name

Chrysanthemum 'Rystar' (Chrysanthemum 'Rystar')

Common pest name

Scientific pest name

Phenacoccus solani

Type

Insect

Current status in UK

Unknown

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

4

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

3

General biosecurity comments

Watching brief for potential impact on tomato production in the Mediterranean. Other southern European countries likely to be more at risk. Precautionary action will be taken on findings on planting material to protect glasshouse crops and botanical gardens.

Defra's Risk register #2

Plant name

Chrysanthemum 'Rystar' (Chrysanthemum 'Rystar')

Common pest name

Green semi-looper

Scientific pest name

Chrysodeixis eriosoma

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 which is morphologically identical to a pest already established in the UK in protected environments and being controlled by IPM. Not expected to cause greater impacts than other species of Chrysodeixis in the UK.

Defra's Risk register #3

Plant name

Chrysanthemum 'Rystar' (Chrysanthemum 'Rystar')

Common pest name

African cottom leafworm; Cotton leafworm; Egyptian cotton leafworm; Egyptian cotton worm; Mediterranean climbing cutworm; Meditteranea Brocade; Tobacco cutworm

Scientific pest name

Spodoptera littoralis

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

Regulated pest; frequently intercepted with occasional outbreaks which have been successfully eradicated in the UK.

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/