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Products > Philodendron Xanadu™ ['Winterbourn']   Philodendron Xanadu™ ['Winterbourn'] - Winterbourn Philodendron   [2nd Image] Habit and Cultural Information Category: Tropical Family: Araceae (Arums) Evergreen: Yes Bloomtime: Not Significant Height: 2-3 feet Width: 3-4 feet Exposure: Cool Sun/Light Shade Irrigation Req.: Medium Water Needs Winter Hardiness: 25-30° F Philodendron Xanadu™ ['Winterbourn'] (Winterborn Philodendron) - An evergreen dense low spreading tropical plant that can reach nearly 3 feet tall by 5 feet wide over time. It has deeply serrated dark green leaves and lacks the aerial roots found in Philodendron bipinnatifidum (P. selloum). Plant in full sun (coastal), bright shade or part day sun and irrigate regularly, especially in the warmer months. Give ample fertilizer to keep foliage a deep green. Hardy to around 25 F. This plant was originally reported to be a selected chance seedling that arose in 1983 in a Western Australian nursery. At that time it given the name Philodendron 'Winterbourn' and was protected under Plant Breeder Rights in Australia, it was then renamed Xanadu by House Plants of Australia and released as their plant of the year in 1988 and this name was trademarked in the US. Under the name 'Winterbourn' it was given the US Plant Patent PP7,030. This patent expired 20 years the original filing date, which was on January 19, 1988. There are now substantiated claims that this plant is not a hybrid or nursery grown cultivar but actually originated from the seed collected from a wild collected plant in Brazil. This plant was described as Philodendron xanadu Croat , Mayo & J.Boos as published in Aroideana; Journal of the International Aroid Society 25: 63 (2002 publ. 2003). If this name holds true it presents problems for the existing a trademark as a specific epithet cannot be trademarked but in this case the trademark was established prior to the plant being described as a species - a bit of a mess. Our plants purchased from Twyford International.  The description above is based on our research and observations of this plant growing in our nursery and in our own and other Santa Barbara gardens. We would appreciate hearing from anyone who has additional information or disagrees with what we have written.