Also called peony tulips named because of the double flowers that you see on peonies. Blue diamond has huge violet-purple blooms which open early and last longer than many other varieties. Tulips are one of the most popular bulbs, as they are great planted with many different colour variations to give a fresh, vibrant spring colour to your garden, patio or decking. They also make great cut flowers to brighten up the house. Double tulips with their heavy flowers slightly more vulnerable to wind, so choose a sheltered spot. Plant in autumn for stunning spring displays.