Black and White Twin Pack contains 20 bulbs (10 of each variety). Bulb size 11/12cm. (Bulb sizes quoted in centimetres refer to the circumference of bulbs. All bulbs are sourced from cultivated stocks.):Paul Scherer (Single) – For years tulip breeders have been trying to breed a near-black flower on a tall stem, and here it is! The large, egg-shaped purple-black blooms are simply breathtaking. RHS Award of Garden Merit winner. Late Flowering. Height 50cm. Bulb size 12cm+.Tres Chic (Lily) – Creamy-white, fading to white, very pointed petals on short, weather-resistant stems. Flowers in May. Height 45cm.