Ageratum houstonianum 'Blue Horizon'

Also Known As

Floss Flower

Plant type

annual / biennial

size

H: 12"-30"
W: 12"-18"

planting zones

2a-12

More Options

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

Ageratums were introduced in 1822 and have been continual favorites ever since. This modern hybrid variety has lovely blue fuzzy flowers on long stems, perfect for cutting.

By: Select Seeds

Who would want a dwarf Ageratum when you can have this old-fashioned, 30” tall variety? Easy, fast & covered with fluffy (pettable!) dense lavender clusters, 4” across, atop branching stems with emerald green, heart shaped leaves. Blooms late Spring to Fall (with dead-heading). Very EASY to grow! Choice in a container as shown, I planted several in a 15 gal pot. Butterfly magnet! Rich, well drained soil.