Edwina Ings-Chambers | Evening Standard standard.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from standard.co.uk Daily Mail and Mail on Sunday newspapers.
Away from his horticultural happenings, Scottish-born McKnight is one of the greats when it comes to hair. He tells Edwina Ings-Chambers about his new revamped The Lazy Girl range