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Ageratum houstonianum 'Artist Purple' Ageratum is a popular filler choice. Ageratum (/əˈdʒɛrətəm/)[2] (whiteweed in the USA) is a genus of 40[3] to 60 tropical and warm temperate flowering annuals and perennials from the family Asteraceae, tribe Eupatorieae. Root rot may occur in poorly drained soils. The flowers are blue, purple, lilac and cream colors. Beds and borders, City, Containers, Cottage/Informal, Hanging baskets. Height: 50cm (20"). Ageratums offer soft, round, fluffy flowers in various shades of blue, pink or white—with blue being most common. Most species are native to Central America and Mexico but four are native to the United States.. Most species are native to Central America and Mexico but four are native to the United States.[3]. The flowers are purple, blue, pinkish or white, less than 6 mm across, with around 30 to 50 flowers and arranged in close terminal flower-heads. Ageratum houstonianum Ariella Blue. Their size and color makes ageratums good candidates for rock gardens, bedding, and containers. Tolerates light shade, and prefers some light afternoon shade in hot summer climates. Ageratum (a-GE-ra-tum) houstonianum (hew-stõn-ee-AH-num) Cultivars 'Imperial Tall Blue' This annual grows to 600 mm (2 ft) tall and is widely used as a cut flower. Suggested uses. Ageratum houstonianum, commonly called floss flower, is a frost-tender annual of the aster family that provides continuous bloom for beds, gardens or containers from late spring to frost. ... blue ageratum grows in compact mounds that generally reach a height of 1-2 feet. in height. Some taller varieties (e.g., the triploid ‘Blue Horizon’) are more erect and grow to as much as 30” tall. Try growing ageratum in wildlife gardens where they will attract butterflies to their blooms. Ageratum houstonianum. Beds and borders, City, Containers, Cottage/Informal, Hanging baskets. Easy to grow, blue ageratum grows in compact mounds that generally reach a height of 1-2 feet. Height: 20cm (8"). One of the tallest, Ageratum houstonianum 'Blue Horizon' (Floss Flower) features fluffy round clusters of lavender to purplish-blue flowers resembling asters. To add more height to your flower beds, choose a variety such as "Blue Horizon" and "Red Top," which reach heights of 24 to 30 inches. A classic annual for any garden, ageratum is a tough plant that can even handle a bit of shade. Some taller varieties (e.g., the triploid Blue Horizon) are more erect and grow to as much as 30 tall. Exposure: Full sun to part shade. Instead, the public now uses the genus name so frequently that it doubles, in essence, as a second common name. Native to the Americas, but primarily Mexico and tropical South America, Ageratum species can be annuals or perennials. Fu, P.P., Yang, Y.C., Xia, Q., Chou, M.C., Cui, Y.Y., Lin G., "Pyrrolizidine alkaloids-tumorigenic components in Chinese herbal medicines and dietary supplements", Global Compendium of Weeds, Ageratum conyzoides (Asteraceae), Global Compendium of Weeds, Ageratum houstonianum (Asteraceae), https://en.wikipedia.org/w/index.php?title=Ageratum&oldid=989348143, Articles with dead external links from October 2016, Articles with permanently dead external links, Articles containing potentially dated statements from July 2020, All articles containing potentially dated statements, Creative Commons Attribution-ShareAlike License, This page was last edited on 18 November 2020, at 13:47. Species flowers are medium blue, however many cultivars are available in commerce in various shades of blue, pink, red, white and bicolor. The flowers are blue, purple, lilac and cream colors. There are two types of shrubs: Straight ; Sprawling ; There are also dwarf species which have adapted to exist indoors. Native: Southern Mexico, Belize, and Honduras. Scientific Name : Ageratum houstonianum Common Name : Floss Flower Blooming Season : Spring, Summer, Late Summer Plant Habit : Upright Spacing : 12 - 18" (30 - 46cm) Height : 14 - 16" (36 - 41cm) Width : 12" (30cm) Exposure : Sun Grower Information : Seed supplied as: Pelleted. Height: 1.2m: Width: 50cm: Categories: Blue Flowering, Romantic Plants. A great value plant that is free flowering and easy to grow. (Maguire, Steyerm. Useful Links: How to sow flower seeds Reasons to buy your seeds from Thompson & Morgan. Posted on November 18, 2008 | Leave a comment. Characterized by their powder-puff flowers, these plants begin to bloom in late spring and keep the show going until the first frost. A classic annual for any garden, ageratum is a tough plant that can even handle a bit of shade. Tall ageratum are also available in seed catalogues. Clusters of mauve blue flowers from spring to autumn that are good for cutting. Acamovic, T., Stewart, C.S., Pennycott, T.W.,"Poisonous Plants and Related Toxins", 2004. 30cm spread . The plant grows to 0.3–1 m high, with ovate to triangular leaves 2–7 cm long, and blue flowerheads (sometimes white, pink, or purple). Similar 'Blue Blazer' This annual grows to 200 mm (7¾ in) and produces mid-blue flowers. Ageratum, (genus Ageratum), any of about 40 species of herbs in the genus Ageratum (family Asteraceae). Genus Ageratum can be annuals, perennials or shrubs, usually bushy in habit, with simple ovate leaves and small fluffy blue, pink or white flower-heads in summer and autumn Details 'High Tide Blue' has a dense, upright habit and produces large, fluffy pale purple to … Cultivation. The narrow lanceolate bracts are pointed, denticulate only at the top and glandular hairy. They are best used as bedding, edging, or container plants. Height: 30cm (12"). Plant in amongst other shrubs or perennials in full sun or part shade in general … Suggested uses. Prefers rich soils with good drainage and consistent moisture throughout the growing season. More. Ageratum mexicanum Hort. is a cool-season annual plant often grown as bedding in gardens. There is also a medium height snowcapped variety, white top on blue flowers. To add more height to your flower beds, choose a variety such as "Blue Horizon" and "Red Top," which reach heights of 24 to 30 inches. Ageratum Houstonianum is a low-growing plant which can reaches up to 0.5 m in height and has multi-colored flowering. The Garden wouldn't be the Garden without our Members, Donors and Volunteers. Zones: Annual in Zones 2-11, may overwinter in Zones 10-11. Early/Late Flowering: . Ageratum conyzoides is an erect, branching, soft, slightly aromatic, annual herb with shallow, fibrous roots. Height: 1.2m: Width: 50cm: Categories: Blue Flowering, Romantic Plants. Height/Spread: 4 to 36 inches tall, 6 to 18 inches wide. Taller varieties make good cut flowers.Genus name presumably comes from the Greek a meaning not and geras meaning old age because the flowers hold their color for a long time. Not to mention, ageratum is one of the truest blue annuals you can find! The editors are not aware of records of the presence of this speciesin Uganda, though this does not necessarily mean that it is absent from this country. It grows to approximately 1 m in height. A. houstonianum is naturalised in Kenya at 1500-2780m altitude. Grow Ageratum houstonianum ‘Blue Mink’ in moist but well-drained soil in full sun. Ageratum Houstonianum Posted on November 18, 2008 | Leave a comment The flossflower species is an annual that grows to a height of over 2 ft (0.6 m), has blue flowers, and tends to become a pest as it liberally reseeds itself all over the garden. FLOWERS. 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