Ageratum 'Blue Horizon'

Ageratum houstonianum ‘Blue Horizon’ Overview Uses: Annual borders, cutting gardens, pollinator plantings, mixed containers, mid-border accents Benefits: Tall stems with soft, fluffy lavender-blue flower clusters, extended bloom season, strong cut-flower performance, reliable summer color USDA Hardiness Zones: Annual Sun: Full Sun to Partial Shade Life Cycle: Annual Growth Habit: Upright, Mounding — branching stems with rounded form Bloom Color: Lavender to Blue Mature Height: 24–30 inches Mature Width: 12–18 inches Bloom Season: Late Spring through Frost Growth Rate: Fast Summary ‘Blue Horizon’ delivers tall stems topped with soft, cloud-like clusters of lavender-blue blooms that bring consistent color from late spring until frost. Its height sets it apart from compact ageratum varieties, making it especially useful in cutting gardens and the middle of sunny borders. The airy flower clusters resemble small asters and attract bees and butterflies throughout the growing season.