Ageratum houstonianum 'Hawaii' (Flossflower 'Hawaii')

Botanical name

Ageratum houstonianum 'Hawaii'

Other names

Flossflower 'Hawaii'

Genus

Ageratum Ageratum

Variety or Cultivar

'Hawaii' _ 'Hawaii' F1 is a compact, mound-forming annual with oval, hairy, bright green leaves and clusters of flowers in deep blue, mid blue, light blue, white and shell pink shades from midsummer until the first frosts.

Foliage

Deciduous

Habit

Clump-forming, Compact, Cushion or Mound Forming

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Colour

Flower

Pale-blue, Dark-blue, Blue, White, Pale-pink in Summer; Pale-pink, Pale-blue, Dark-blue, Blue, White in Autumn

Foliage

Green in Summer

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How to care

Watch out for

Pests

Generally pest free.

Specific diseases

Foot and root rot

General care

Propagation

Sow indoors in early spring.

Propagation methods

Seed

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Monthly care advice

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Where to grow

Ageratum houstonianum 'Hawaii' (Flossflower 'Hawaii') will reach a height of 0.25m and a spread of 0.2m after 1 year.

Suggested uses

Beds and borders, City, Containers, Cottage/Informal, Hanging baskets

Cultivation

Plant in a sheltered postion in full sun. Will do well if grown in a pot or container. Keep moist, do not allow to dry out. Deadhead to prolong flowering.

Soil type

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

Soil drainage

Moist but well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Full Sun

Aspect

South, West

Exposure

Sheltered

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

Indoor heated (H1), Tender in frost (H3)

USDA zones

Zone 11, Zone 10, Zone 9, Zone 8, Zone 7, Zone 6, Zone 5

Defra's Risk register #1

Plant name

Ageratum houstonianum 'Hawaii' (Flossflower 'Hawaii')

Common pest name

American serpentine leaf miner; chrysanthemum leaf miner

Scientific pest name

Liriomyza trifolii

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 already subject to review at the EU level (2013). Regularly intercepted in the trade.

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/