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Herbaceous Perennial

Ageratum petiolatum

petiolate ageratum

A compact, bushy perennial to 60cm tall with small, ovate leaves and from summer into early autumn, dense clusters of fluffy pale lilac-blue flowers on upright, branching stems

Synonyms
Ageratum scabriusculum
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Size
Ultimate height
0.5–1 metres
Time to ultimate height
2–5 years
Ultimate spread
0.1–0.5 metres
Growing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drained, Well–drained
pH
Acid, Alkaline, Neutral
Colour & scent
StemFlowerFoliageFruit
Spring Green
Summer Blue Purple Green
Autumn Blue Purple Green
Winter
Position
  • Full sun
Aspect

West–facing or South–facing

Exposure
Sheltered
Hardiness
H2
Botanical details
Family
Asteraceae
Native to GB / Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus

Ageratum can be annuals, perennials or shrubs, usually bushy in habit, with simple ovate leaves and small fluffy blue, pink or white flower-heads in summer and autumn

Name status

Correct

How to grow

Cultivation

Grow in any fertile soil with good drainage

Propagation

Propagate by seed or from softwood cuttings

Suggested planting locations and garden types
  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Flower borders and beds
Pruning

No pruning required. Can be cut back hard in spring to maintain a good shape

Pests

Generally pest-free

Diseases

Generally disease-free

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