Darwin Hybrid Tulips are known for the HUGE size of their brilliantly coloured flowers. The blossoms are an almost perfect pyramid shaped when closed, but they can measure as much as 6" (15 cm) in diameter when fully opened.
Because of their long stems, lovely pyramid shape, and brilliant colours, Darwin Hybrids are often considered the very best type of tulip to raise for cut flowers. However, there are definite advantages to growing them for beds and borders, especially in areas where they can be sheltered from strong winds.
Unlike many types of tulip which only look well for the first couple of years, Darwin Hybrid Tulips will come back looking great year after year (provided you don't cut the leaves off after blooming). As a result, you will sometimes hear them called "perennial" tulips.