In my experience, snowflakes are much more reliable and likely to spread than snowdrops, and because they are a member of the poisonous Amaryllis family, voles and squirrels don't eat them. They thrive without division for decades and often spread by seed in congenial situations. They like moist soil and are unusual in being more tolerant of a wet situation than most bulbs, but they'll also do fine in average garden soil. They like full sun to part shade and do well under deciduous trees. S.C. In old Charleston graveyards, summer snowflakes huddle up against headstones like friends comforting the bereaved.
Nothing looks cheerier on a cold, spring morning.
Snowflakes are, in fact, notable for their ability to withstand frost without damage, and as an heirloom bulb, they are particularly well-suited not just to old graveyards but to old homesites. At my old house, summer snowflakes bloomed with Virginia bluebells, a combination I loved. In fact, now that I think of it, even the summer snowflakes in my former garden seemed to have appeared out of nowhere and charmed me like quiet surprises instead of presenting themselves like payoffs for planful effort.