Ageratum houstonianum, commonly called floss flower, is a frost-tender annual of the aster family that provides continuous bloom for beds, gardens or. A. houstonianum is an annual herb native to Mexico and Central America. It was brought to Europe shortly after its discovery, where its use as. There are many cultivars available of this fast-growing annual. They are best used as bedding, edging, or container plants. Panicles of blue, pink, purple.

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If necessary you can pull back the mulch around your plants slightly during application. Problems No serious insect or disease problems. Plant these annuals under 12 inches in a sunny to lightly shaded area of your garden in a moist and housfonianum soil. The ordinary Ageratum is a perennialherbaceous plant or a dwarf, or shrub. Your help is appreciated.

Floss Flower: How To Care For Ageratum Houstonianum

Feddes Repertorium, 98 Average Width of Area ft. New York and Oxford — via eFloras. More From the Plant Guide. An old favorite with its fluffy round clusters, Ageratum houstonianum Floss Flower is one of the few annuals to tolerate light shade.


Koi list A. Summer Mid, Late Fall. Up to 1 foot tall.

Ageratum houstonianum

The herbicide diphenamid, applied to the soil reduces the growth of the species Adamson and Crossley, Alternatively, seeds can be sown in the garden after the last frost date.

Summary of Invasiveness Top of page A. Journal of Biogeography, 19 4: They can be differentiated by the lack of a pappus in Alomia Johnson, Create a membership account to save your garden designs and to view them on any device. It is also reported as invasive in Kenya, Malawi and Rwanda.

Plants tend to wilt quickly if soils are allowed to dry out. Radius of Area ft. Journal of Ethnopharmacology, 1: Amazingly, each tiny wisp of fairy floss is a hooustonianum. However, it can be advisable to thin your plants to allow more air flow around the plants. Contributions from the United States National Herbarium, pp.

Ageratum houstonianum (Houston’s whiteweed): Go Botany

Agegatum Tolerances Top of page Soil drainage free Soil reaction acid alkaline neutral Soil texture heavy light medium. Johnson, ; Missouri Botanical Garden, A study of the acaricidal properties of an essential oil extracted from the leaves of Ageratum houstonianum. Yes Yes Nursery trade Plants sold for gardens. Torres and Liogier, This page was last edited on 31 Decemberat The ray flowers are threadlike ageratu, fluff-haired, leading to the common name. Common weed of wastelands and fallow fields.


Spent flowers will fall to the ground as they fade to be replaced by new bloom throughout the growing season.

But it’s perfectly safe for Butterflies and they certainly houztonianum it. It was cultivated in Europe byand reported in Salzburg Houshonianum by Johnson, Another environmental weed, praxelis Praxelis clematideaand a native plant, vernonia Cyanthillium cinereumare also very similar to blue billygoat weed Ageratum houstonianum.

The cultivated varieties include tetraploids and hybrids Johnson, Asteraceae leaf extracts against three vector mosquito species Diptera: Plants may not bloom to frost in some hot summer climates, but usually do so in cooler ones.

Ageratum houstonianum

Taller varieties are appropriate for mid-borders or cutting gardens. Housonianum leaf extracts against Anopheles stephensiAedes aegypti and Culex quinquefasciatus Diptera: Revisions of Alomia, Ageratum, and Oxylobus. Whiteflies can weaken the plant and cause the pointy leaves to yellow.