Well-known mix of singles and doubles. These bright 2′ flowers come in red, pink, orange, and yellow. The nasturtium (Tropaeolum majus) is a hardy annual that grows by climbing and sprawling. These flowers are edible and can be used many ways in culinary recipes. Toss in salads, mix in eggs for a colorful omelette, garnish party platters, or use as a substitute for capers.