Ageratums are easily grown from seed. Tolerates light shade, and prefers some light afternoon shade in hot summer climates. Can be grown in containers. 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. Most often you can see the blue flowers of various hues in gardens and parks. Ageratum houstonianum forma niveum Do not exclude light or allow to dry out. Will do well if grown in a pot or container. Zones: Usually grown as an annual; perennial in Zones 10-11. Ageratum houstonianum has numerous sticky hairs on the bracts surrounding its flower-heads (the involucral bracts are glandular pubescent). How to grow Ageratum 'Blue Mink' Plant size. Seed may also be sown directly in the garden after last frost date, however flowering season will be shorter (late summer to frost). Floss Flower is sometimes cultivated and is often a weed in nursery stock. Description: Ariella Blue is a quick growing, compact mounding plant that grows to a height and width of 30cm x 30cm. Ageratum houstonianum ‘Blue Mink’ bears fluffy, powder-blue flowers. Ageratum Houstonianum is a low-growing plant which can reaches up to 0.5 m in height and has multi-colored flowering. Prefers rich soils with good drainage and consistent moisture throughout the growing season. Ageratum houstonianum. Ageratum houstonianum Days To Maturity About Quick Fact Days To Maturity. They are about 18 inches in height with blue flowers. Tall ageratum are also available in seed catalogues. 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.Features fluffy flowers (basically asters with ray flowers absent) in flattened to slightly rounded clusters atop compact, mounded plants generally ranging from 4” to 18” tall. Ageratum houstonianum. Ageratum Houstonianum is a low-growing plant which can reaches up to 0.5 m in height and has multi-colored flowering. A classic annual for any garden, ageratum is a tough plant that can even handle a bit of shade. Ageratum plants grow from seed or from small seedlings sometimes found in garden centers. Native: Southern Mexico, Belize, and Honduras. They grow well in sun or partial shade, from early summer to first frost. Their size and color makes ageratums good candidates for rock gardens, bedding, and containers. 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). Ageratums are grown for their flowers, especially A. houstonianum. Average number of days from seeding date to harvest, within a specific crop group. The margins are slightly toothed or serrate. They are quite easy to grow, producing a profusion of fluffy flowers all season long. The stems and leaves are covered with fine white hairs; the leaves are egg-shaped with broad end at base (ovate) up to 7.5 cm long. Ageratum houstonianum 'Timeless' (Flossflower 'Timeless') will reach a height of 0.5m and a spread of 0.2m after 1 year. Useful Links: How to sow flower seeds Reasons to buy your seeds from Thompson & Morgan. 30cm height . 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. tall (15-60 cm) and mixes extraordinarily well with all other annuals and perennials. 'Blue Blazer' This annual grows to 200 mm (7¾ in) and produces mid-blue flowers. There are many cultivars available of this fast-growing annual. Key Features: The Dressed to Impress™ range provides you with a living bunch of flowers. Easy … Ageratums are grown for their flowers, especially A. houstonianum. More. Fast growing. The leaves of the plant are oval at the stem and triangulate out, reaching a length of 1 to 3 inches (2.5 to 7.5 cm). No serious insect or disease problems. Taller plants usually benefit from some support. Height: 25cm(10in) Width: Depth: Plant Class: Half Hardy Annual (HHA). The flowers are blue, purple, lilac and cream colors. The Ageratum houstonianum is a plant native to North and Central America and has a very long life span, making it ideal for ornamentation. With good cultivation care you can enjoy this plant with great benefits and an invaluable aesthetic value. Flossflower (Ageratum houstonianum) The Flossflower is an annual Ageratum species, that can range in height from 12 to 39 inches (30 to 100cm). Good for beds, borders, pathways and rockeries. Scientific Name : Ageratum houstonianum. One of the tallest, Ageratum houstonianum 'Blue Horizon' (Floss Flower) features fluffy round clusters of lavender to purplish-blue flowers resembling asters. 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