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  2. Oxalis triangularis - Wikipedia

    en.wikipedia.org/wiki/Oxalis_triangularis

    Oxalis triangularis, commonly called false shamrock, is a species of perennial plant in the family Oxalidaceae. It is native to several countries in southern South America . This woodsorrel is typically grown as a houseplant but can be grown outside in USDA climate zones 8a–11, preferably in light shade.

  3. Hardiness zone - Wikipedia

    en.wikipedia.org/wiki/Hardiness_zone

    For practical purposes, Canada has adopted the American hardiness zone classification system. The 1990 version of the USDA Plant Hardiness Zone Map included Canada and Mexico, but they were removed with the 2012 update to focus on the United States and Puerto Rico. [8] The Canadian government publishes both Canadian and USDA-style zone maps. [37]

  4. Oxalis - Wikipedia

    en.wikipedia.org/wiki/Oxalis

    Oxalis tetraphylla – four-leaved pink-sorrel, four-leaf sorrel, Iron Cross oxalis, "lucky clover" Oxalis triangularis – threeleaf purple shamrock; Oxalis trilliifolia – great oxalis, threeleaf woodsorrel; Oxalis tuberosa – oca, oka, New Zealand yam; Oxalis valdiviensis – Chilean yellow-sorrel; Oxalis virginea – virgin wood-sorrel

  5. New plant hardiness zone map to help NC gardeners, farmers ...

    www.aol.com/plant-hardiness-zone-map-help...

    An updated plant hardiness zone map released by the USDA last month shows nearly half of the country is now classified in a "warmer" zone than it used to be. That includes parts of Southeastern N.C.

  6. Big News, Gardeners: The USDA Just Updated Their Plant ...

    www.aol.com/lifestyle/big-news-gardeners-usda...

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  7. File:Oxalis Triangularis Photonasty Timelapse.ogv - Wikipedia

    en.wikipedia.org/wiki/File:Oxalis_Triangularis...

    English: Oxalis triangularis (Purple Shamrock) is a classic example of a plant which responds with movement to external stimulus. The leaves open and close in response to varying light levels with the result that they are open during during the day and close at night.