Photo by Annie's Annuals & Perennials
Used with permission, all rights reserved
Ageratum houstonianum 'Blue Horizon'
Also Known As
- Floss Flower
Plant type
annual / biennial
size
- H: 12"-30"
- W: 12"-18"
planting zones
- 2a-12
Ageratum houstonianum 'Blue Horizon' plant details
Ageratum houstonianum 'Blue Horizon' is a fast-growing broadleaf deciduous annual / biennial with green foliage. In fall and summer lavender flowers emerge. Attracts bees, beneficial insects and butterflies making it an excellent addition to pollinator gardens. Grows well with sun - mostly shade and even moisture - regular water. Does well in average, gritty, rich and well-drained soil. A good option if you're seeking something heat tolerant, humidity tolerant and verticillium wilt resistant.
CHARACTERISTICS OF Ageratum houstonianum 'Blue Horizon'
- Plant type: annual / biennial
- Plant family: asteraceae
- Foliage: deciduous green
- Mature size: 12 IN - 18 IN - wide, 12 IN - 30 IN - tall
- Flowers: lavender blooms in fall and summer
- Uses: container plant, cottage garden, cutting garden, dried-arrangements, easy-to-grow, heart-shaped leaves, long-blooming
GROWING CONDITIONS for Ageratum houstonianum 'Blue Horizon'
- USDA Zones: 2a - 12
- Sun exposure: sun - mostly shade
- Watering frequency: even moisture - regular
- Resistant to: deer and rabbit, heat, humidity and verticillium wilt
- Soil needs: average, gritty, rich and well-drained
Nursery contributed plant descriptions
By: Select Seeds
Garden photo gallery of Ageratum houstonianum 'Blue Horizon'
Gardening facts about Ageratum houstonianum 'Blue Horizon' plant
How to Grow Ageratum houstonianum 'Blue Horizon'
Sun Exposure
- sun - mostly shade
Water Needs
- even moisture - regular
Soil Needs
- average
- well-drained
- rich
- gritty
Special Situation
- heat tolerant
- humidity tolerant
- verticillium wilt resistant
Features
Foliage Color
- green
Flower Color
- lavender
Wildlife
- beneficial insects
- bees
- butterflies
- deer resistant
- rabbit resistant
Flower Season
- fall
- summer
Foliage Season
- deciduous
Landscape groups by tags
See other plant types of Ageratum for your garden
aka Butterfly Mist
Plant Type
Perennial
Zones
9a-12
Size
Height: 2'-3'
Width: 2'-3'
- sun - dappled shade
- even moisture - occasional
aka Ageratum 'Blue Bouquet', Blue Bouquet Cutting Ageratum
Plant Type
Annual / Biennial
Zones
2a-12
Size
Height: 12"-24"
Width: 6"-20"
- sun - dappled shade
- even moisture - regular
aka Floss Flower
Plant Type
Annual / Biennial
Zones
2a-12
Size
Height: 1'-3'
Width: 1'-3'
- sun - dappled shade
- even moisture - regular
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