![]() Spreading tendencies must be watched, particularly if planted in a perennial border. Plants tend to flop and may need support. This plant has some susceptibility to powdery mildew. Insects, Diseases, or Other Plant Problems: Leaf miners and aphids may visit. This plant is moderately resistant to damage from deer. Propagate by clump division in early spring. It is not recommended for smaller planting areas as it spreads aggressively by its rhizomes and self-seeding. This is a great plant to consider for a wildflower garden or naturalized area, does especially well around pond borders as long as spreading roots will not affect other plants. Blueish purple flowers are fluffy, tubular (to 1/ 2” across). Cut back taller plants in spring to prevent flopping. Purplish stems have toothed deltoid leaves. This plant prefers moist humusy soils that do not dry out in full sun to partial shade areas. It is nectar-rich and pollinators love it. Under cultivation, it becomes a choice perennial with 8 weeks of blue flowers from late summer until frost. ![]() It looks like the annual ageratum and in that regard is sometimes commonly called hardy ageratum. It is a showy native plant that is considered a weed in the coastal plain, growing along roadsides on moist ditch banks. Phonetic Spelling koh-no-KLY-nee-um koh-el-ES-tee-num DescriptionĬommonly called mistflower, this late summer to fall-blooming herbaceous perennial is native to the Eastern United States. Ageratum 'Blue Planet': Another Heavenly Favorite.National Garden Bureau Promotes Angelonia 'Archang.Caladium 'Autumn Beauty' - An Exciting New Plant F.Eve's Needle - It Will Produce Thorns For You.No, Virginia, It's Not Too Late for Christmas.Have you used Ageratum in your garden? Tell us about it in the comment section. Accents well with bright white flowers in the garden bed or in bouquets." This tall ageratum branches without being pinched back and flowers prolifically. National Garden Bureau comments, "Long-lasting blooms like tiny explosions are out of this world in gardens or containers, and especially planted in mass. Uses: Massed planting, annual beds, mixed borders, container gardens, indoor containers, cutting garden.Ĭomments: ''Blue Planet" is set for release in 2019. Germinates from seed in approximately 85 to 100 days. pH 6.1 to 7.8įeatures: Compact habit, abundance of flowers, heat tolerant, rain and wind tolerant. Space 12" apart.Ĭlimate Zones: Not applicable. 'Blue Planet' is a fine addition to the late-season annual garden. Its ray-shaped, thread-like flowers last longer it branches and maintains good form without the need for pinching. A common name is "Flossflower."Īgeratum is well-known among gardeners for its late summer to early fall bloom, but 'Blue Planet' is something special. 1795-1733), a Scottish-born surgeon and botanist who collected plants in Mexico, Central America and the West Indies. The species name, houstonianum, honors Dr. Ageratum refers to the fact that it doesn't wither quickly. 'Blue Planet' is a fine new variety of Ageratum houstonianum. Folks at the National Garden Bureau - in cooperation with various growers, test gardens and gardeners - are always on the hunt for exciting new introductions. If you've been staring off into space wondering what you'll plant in your garden next year, here's a discovery for you: Ageratum 'Blue Planet'. Ageratum houstonianum 'Blue Planet' - Photo Credit: National Garden Bureau
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