(Ageratum houstonianum) Ageratum is a member of the Aster family native to southwestern North America and Central America. Gardeners around the world prize it for its delightful colors and whimsical, pom-pom shaped flowers. Direct sow seeds outdoors in spring, after last frost, or start indoors 6-8 weeks before last frost and transplant out after all chance of frost has passed. Light aids germination so be sure to surface sow seeds uncovered, or lightly sprinkled with very fine vermiculite. Ideal germination temperature is 75-80F. Seeds germinate in 7-10 days. Plants are not cold hardy. They prefer full sun, but will also grow well in part shade. Plants tolerate a wide range of soil, but rich, well-drained soil is best. Space at least 10 inches apart. To promote blooming, deadhead regularly. BEWARE: ALL PARTS OF THIS PLANT ARE POISONOUS!
Annual. Old-fashioned favorite in gentle pastel tones of lavender, blue, and white. Ageratum flowers make a lot of nectar and support beneficial insect populations. They are also a choice plant for the front of the border, in rock gardens and more. So precious!
- Full Sun/Part Sun
- Sprouts in 7-10 Days
- Seed Depth: Surface Sow
- Ideal Temperature: 75-80 F
- Plant Spacing: 9-12"
- Frost Hardy: No
- Ageratum houstonianum
Growing Tips: Start indoors 6-8 weeks before last frost. Do not cover seed, as light aids germination. Bottom water or mist to keep moist until sprouts appear. Grow in full sun to light shade. No pinching or support is needed.
(Ageratum houstonianum) Annual. Extra abundant producer of blooms! Miniature daisies in clusters, with petals so fine they look like glistening silk thread, giving them their common name of Floss Flower. Each bloom is bi-colored a soft lavender-blue to white. The soothing tones make an ideal foil for warmer colors in summer ornamental beds. Blooms all summer long, height to 8”.