Mistflower Seeds – Blue Hardy Ageratum

Blue Mistflower, also known as Hardy Ageratum (Conoclinium coelestinum), is a hardy perennial prized for its clusters of soft blue flowers. This upright, spreading plant is perfect for borders, pollinator gardens, and rain gardens. Its dense growth also makes it an excellent ground cover. The vibrant blooms attract bees and butterflies, adding both beauty and biodiversity to your landscape.

Features and Specifications:

• Plant Type: Perennial flowering plant

• Botanical Name: Conoclinium coelestinum

• Common Name: Blue Mistflower or Hardy Ageratum

• Growth Habit: Upright and spreading; excellent for ground cover

• Height: Typically 18–24 inches tall

• Bloom Time: Late summer to fall

• Flower Color: Soft blue to lavender

• Growing Season: Warm season perennial

• USDA Hardiness Zones: 5–9

• Sowing Months:

  • Zones 5–7: March–May

  • Zones 8–9: February–April or September–October

• Light Requirements: Full sun to partial shade

• Soil Needs: Moist, well-drained soil; tolerates wet conditions near ponds or rain gardens

• Watering: Keep soil consistently moist, especially in dry periods

• Uses: Pollinator gardens, pond edges, rain gardens, and as ground cover

• Attracts: Bees and butterflies for natural pollination support