The Tricolor Nasturtium is a summer-dormant, tuberous, perennial climber with a profusion of tricolor flowers from winter to early summer. Borne singly in the leaf axils, the small yellow flowers are adorned with a showy purple-tipped, orange-red calyx and a long red or purple spur. They create a spectacular floral display for months and contrast nicely against the soft, bright green, deeply lobed leaves. They're also pest and disease free but keep an eye out for whiteflies and red spider mites.

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Source: Gardenia.net