Friday, December 30, 2011

Parthenium

Parthenium

Parthenium integrifolium ( Wild Quinine )
A deep fleshy-taprooted perennial, reaching a maximum size of 5 ( rarely over 4 ) x 3 feet, that is native to open woodlands and moist prairies in eastern North America ( southeast Minnesota to Massachusetts; south to Texas to northern Georgia ).
The toothed, oval leaves are up to 12 x 5 inches in size. The coarse foliage is glossy deep green.
The pure white flowers are borne on wide flat-topped clusters during mid to early autumn.
Hardy zones 3 to 8 in full sun to partial shade on moist, fertile, deep, well drained soil. Easy to grow and is very heat and drought tolerant once established. It is rarely bothered by insect pests or disease and its foliage remains healthy right into fall. Propagation is from seed, sown during spring or after 6 weeks or more of cold moist stratification. They take 2 or more years to bloom from seed and grow slowly for the first season. They can also be propagated from stem cuttings taken during the beginning of summer.

* USDA-NRCS PLANTS Database

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