Seed Needs, Black Velvet Nasturtium (Tropaeolum minus) 110 Seeds Quality Nasturtium seeds packaged by Seed Needs. Packets are 3.25" wide by 4.50" tall and come with a full colored illustration on the front side, as well as detailed sowing instructions on the reverse. Black Velvet will display 2 to 3 inch, mahogany colored blooms through the summer months, which will attract an array of beneficial insects to the garden. Categorized as an annual flowering plant, Black Velvet Nasturtium will grow quickly from freshly harvested seeds. The plants will then bloom profusely, during the summer months, and will later wilt with the first killing frost. Black Velvet Nasturtiums will grow to a mature height of roughly 8 to 14 inches wide, making them an excellent choice for pots & containers, as well as window boxes and raised beds. All Nasturtium seeds sold by Seed Needs are Non-GMO based seed products and are intended for the current & the following growing season. All seeds are produced from open pollinated plants, stored in a temperature controlled facility and constantly moved out due to popularity.