The scientific name of greater periwinkles is ‘Vinca major’ and is from a family of six species of Vinca.
Greater periwinkles are also known as ‘big leaf periwinkles’, ‘large periwinkles’, ‘blue periwinkles’ and ‘blue buttons’
Greater periwinkles grow up to 50-70 cm (1.6 – 2 .3 feet) in height and spread 2-5 metres (6.6 – 16.4 feet) wide.
The flowers of greater periwinkles can be white or blue in colour but are typically coloured in purple shades and are 3-5 cm(1.2 – 2 inches) in diameter.
Greater periwinkles are an invasive weed in parts of Australia, New Zealand and United States, due to the ease of propagation from waste plant material.
The stems of greater periwinkles can be used for basket weaving and the plant is also used medicinally, although it is poisonous if large portions are consumed.
Greater periwinkles are happy to grow in shady areas and send down roots from their runners, making them easy to grow from cuttings.
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Info-http://tenrandomfacts.com/greater-periwinkle/
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