plant keeps the soil too waterlogged for proper root functioning. Mature Sarracenia are commonly propagated by division. Their rhizomes extend and produce new crowns of pitchers over the course of a few growing seasons, and cultivators divide and separate the rhizomes during the plant's winter dormancy or early in the growing season. This technique is also used to separate sections of rhizomes which have no pitchers: when re-potted, the section usually generates a new crown of pitchers. A further technique is employed to encourage new crowns to appear which does not involve division of the rhizome: small notches up to 5 mm deep are cut into the top of the rhizome, whereupon a new crown frequently develops at the site of the notch. AGM cultivars The following have won the Royal Horticultural Society's Award of Garden Merit:Sarracenia 'Anna Carlisle'Sarracenia 'Colin Clayton'Sarracenia 'Dixie Lace'Sarracenia 'Jenny Helen'Sarracenia 'Juthatip Soper'Sarracenia 'Vogel'Sarracenia × catesbaei 'Violet'Sarracenia × mitchelliana 'Victoria Morley'Sarracenia × moorei 'Brooks's Hybrid' See also North American Sarracenia Conservancy Meadowview Biological Research Station Notes a.Since McPherson & Schnell (2011) did not assign these forms to any particular variety, they are to be placed under the autonymous variety according to the botanical code. b.This combination had been published previously, but was only validated in McPherson and Schnell's 2011 monograph. References Further reading Schnell, Donald E. 2002. Carnivorous Plants of the United States and Canada. Portland. Schnell, Stewart McPherson, Donald E. (2011). Sarraceniaceae of North America''. Poole: Redfern Natural History Productions. . External links Sarracenia Taxonomy by Barry Rice Sarracenia – the Pitcher Plants by the Botanical Society of America Sarracenia Growing Guide and Distribution Map by Tom's Carnivores Growing Sarracenia by the International Carnivorous Plant Society The Inner World of Sarracenia by the John Innes Centre Carnivorous plants of North America Rhizomatous plants Ericales genera