Overview
Ageratum houstonianum 'Leilani Blue' is a bushy herbaceous perennial in the genus Ageratum, part of the Asteraceae family, with deciduous foliage. Ageratum houstonianum 'Leilani Blue' grows best in full sun, and tolerates most soils and any pH. Its UK hardiness is rated H2. Suggested uses include city and courtyard gardens, cottage and informal garden and patio and container plants.
About
Ageratum houstonianum 'Leilani Blue' is a bushy, herbaceous perennial cultivar within the Ageratum genus, known for its simple, ovate leaves and small, fluffy flower clusters. This cultivar thrives in full sun with a west or south-facing aspect and prefers sheltered conditions. It grows well in a variety of soil types including chalk, clay, loam, and sand, with a pH ranging from acid to alkaline, favouring moist but well-drained or well-drained soils. Hardy to UK zone H2, it is suitable for city and courtyard gardens, cottage and informal gardens, as well as patios and containers, offering seasonal interest in spring and summer.
About the genus
Ageratum is a genus of 40 to 60 tropical and warm temperate flowering annuals and perennials from the family Asteraceae, tribe Eupatorieae. Most species are native to Central America and Mexico but four are native to the United States.
Wikipedia contributors, "Ageratum", CC BY-SA 4.0 — Ageratum
Growing conditions
Best soil and position for Ageratum
- Sunlight
- Full sun
- Soil type
- Chalk, Clay, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Well-drained
- Aspect
- West-facing, South-facing
- Exposure
- Sheltered
- UK hardiness
- H2
Plant details
Ageratum houstonianum 'Leilani Blue' size, habit and characteristics
- Plant type
- Herbaceous Perennial
- Habit
- Bushy
- Foliage
- Deciduous
- Suggested uses
- City and courtyard gardens, Cottage and informal garden, Patio and container plants
Care notes
Pruning and caring for Ageratum houstonianum 'Leilani Blue'
- Propagation
- Propagate by seed or from softwood cuttings
- Pest resistance
- Generally pest-free
- Disease resistance
- Generally disease-free
Frequently asked questions
Where is the best place to plant Ageratum houstonianum 'Leilani Blue'?
Ageratum houstonianum 'Leilani Blue' prefers full sun. It suits sheltered positions.
What soil does Ageratum houstonianum 'Leilani Blue' need?
Ageratum houstonianum 'Leilani Blue' is adaptable and grows happily in most soil types, including chalk, clay, loam and sand. It is happy in soil of any pH. Aim for soil that stays moist but well-drained to well-drained.
Is Ageratum houstonianum 'Leilani Blue' hardy in the UK?
Ageratum houstonianum 'Leilani Blue' has an RHS hardiness rating of H2, meaning it is tender, tolerating 1–5°C, and needs frost-free protection over winter.
How do I propagate Ageratum houstonianum 'Leilani Blue'?
Propagate by seed or from softwood cuttings.