The Giant Snowdrop. The best variety for naturalizing in American gardens, this large-flowering Greek native, circa 1874, has broad, ivory flowers tipped green with gray-green foliage. It well deserves it's many awards. Bulb size: 7 cm/up. March/April. Plant 4" deep and 2" to 4" apart. HZ: 3-8. 5" to 8".
Galanthus are
The Art & Soul of Spring.
Galanthus Horticultural Tips Stinze Plantings