Thunbergia Plants - Collection A captivating trailing plant that produces vivid multicoloured flowers. The Thunbergia Plants - Collection is Commonly known as Black Eyed Susan. It can be trained up a fence or trellis to create an amazing aesthetic in your garden. The Thunbergia Plants - Collection also looks fantastic being left to cascade down the side of hanging baskets, creating beautiful flower displays full of colour. Producing magnificent pink, orange and yellow flowers contrasted by the dark eyes centering each exotic flower. The Thunbergia Plants - Collection flowers June-August. Height 100-150cm; spread 90-100cm.