Darwin Hybrid Tulips (Tulipa) among the tallest of all Dutch tulips, Darwin Hybrids offer big, giant, showy flowers that stand out in your spring garden. You can order these special flower bulbs in many colors, bicolors with striping and edging. Their long stems make them great cut flowers, but also excellent choice on a sheltered patio in a big flower pot. Darwin Hybrids are single flower cultivars originally developed by crossing Fosteriana and Single Late varieties.