Nerine rehmannii BULB (Amaryllidaceae) It has slender leaves of up to 15 cm with the flowering stems reaching 20cm. Up to 10 white flowers which gets a hint of pink when they age. Sowing : The seeds are sown in deep seed trays in a well-drained mixture such as equal parts of river sand, silica sand and finely sifted compost. Sprinkle seeds evenly over the surface and cover them with a thin layer of the same mixture. Watering with a fine rose is ideal.