If smaller size is OK with you , you really can't go wrong with the species and their varieties. What they lack in size they make up for in colour as they return year after year after year with ever increasing numbers. They will even spread by seed if they like your garden. There is a species that I'm trying from seed this year, Tulipa sprengeri, that is one of the last tulips to bloom ( sometimes into June) and is also fairly tall.
