Answer: Ornithogalum are related to lilies, and grow from a bulb. They cannot tolerate frost and should not be grown outdoors in your gardening region. When the flowers are spent, cut down the flowering stalks but leave the foliage alone. The leaves will yellow and die at the end of the season and the bulb will go into dormancy. Leave the bulb in the pot after the foliage dies down and don't water the soil until new growth begins again. Your plant shouldn't need repotting for several years and because the bulbs grow slowly may only need to have the potting soil renewed every 3-4 years.
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