may also be planted with yellow and white narcissi or small, early-flowering red tulips-and even in lawns with snowdrops and crocuses. Glory of the snow self-seeds as well as produces new bulbs. Fall-planted bulbs will flower the following spring, whereas new plants from seed will flower in two or three years. They'll multiply over time and should be split up when they begin to look too crowded. This may be done just after the leaves wither. Left to their own devices, they can self-seed into a dense carpet of bloom.