SITE

Ageratum

Botanical Name

Ageratum houstonianum

Hardiness

Half hardy annual

Height

6 to 15 inches

Width

6 to 12 inches

Flowers

Summer till frost: blue, lavender, white, pink

Light

Part shade to full sun

Soil

Well-drained

Planting & Care

• Space compact plants 6 inches apart, taller varieties 9 inches apart

Problems

Powdery mildew in excess shade, root rot in poorly drained soils

Varieties

• Hawaii Series - 6" compact; flowers of blue, royal blue, and white
• Blue Danube - 7" and uniform
• Swing Pink - 6-8" pink
• Blue Horizon - 18", weather resistant flowers, long stems good for cutting
• LeiLani Blue - 14-16" by 12"
• High Tide - 24", dense, self cleaning