Ageratum houstonianum | Floss Flower Seeds

Ageratum houstonianum, commonly known as floss flower, produces clusters of soft, fluffy blooms that bring colour and texture to summer gardens. Depending on the variety, flowers appear in shades of blue, lavender, pink or white.

This annual flower offers options for different growing spaces: compact varieties suit edging, bedding and containers, while taller varieties are useful for cut flowers and bouquet fillers. Check individual variety descriptions for height and suitability for cutting.

Start seeds indoors for an earlier display. Surface sow, as light supports germination, and keep the growing medium evenly moist. Plant outdoors after the risk of frost has passed, choosing a sunny position with fertile, well-drained soil. Regular removal of faded flowers encourages continued blooming.