White and orange Bougainvilleas aren’t as hardy, but will be happy in a conservatory or heated greenhouse. The hardiest variety is … Bougainvillea can do well in this country if grown in a frost-free, reasonably sunny conservatory or, at a pinch, in a big porch. Bougainvillea Glabra Buttiana Hybrid(Glabra X Peruviana) Leaf hardy to around +2C , Stem hardy to possibly -7C if kept under a canopy -I'm buying a 2nd plant to try trailing under a conifer trunk this years and overwintering it outside as a trial. 99 100pcs Colorful Bougainvillea Seeds Balcony Flower Pot * Garden Flowers Seeds in Bonsai Floriferous Hardy Plant Tree Sementes Burgundy 2.9 out of 5 stars 7 £2.99 £ 2 . When planting your Bougainvillea in … This plant seems to be ignored by aphids and other bugs. Free UK Delivery. Buy Bourgainvillea 'Sanderiana' online, from The Palm Tree Company, specializing in a wide range of beautiful, top quality hardy palm trees. Bougainvillea ‘Barbara Karst’ is one of the hardiest varieties available, with stunning magenta-purple flowers all summer long.