ageratum
Ageratum houstonianum
RHS Plants for Pollinators
USDA zones2 to 11
SunHandles full sun to partial sun
WaterHandles moderate to moist soil
Size6 inches to 2.5 feet tall6 to 18 inches wide
- Growth rate
- Moderate
- Bloom season
- Summer, autumn
- Bloom color
- Medium blue
- Foliage color
- Green
- Soil types
- Sand, loam, clay, chalk
- Soil pH
- Acid, alkaline, neutral
Garden uses
Attracts
Notes
Ageratum (Ageratum houstonianum) is an annual for borders, containers, and pollinator gardens. It is not cold-hardy and will not survive freezing temperatures. This plant likes full or part sun and average to moist soil of most types. Medium blue flowers open from early to late summer and attract butterflies and bees. Deer and rabbits tend to pass it by.
Pairs well with Snapdragon, Prairie Sun rudbeckia, and Silver feather grass.
Native range
North America and Central America.