Answer: Your plant is Ornithogalum caudatum, also known as Pregnant Sea Onion or False Sea Onion. It's a houseplant in most areas of the country (hardy to about 25F) and is generally grown for the bulb and foliage rather than the tall wands of small green and white flowers. The strap-like leaves hang downward and grow to 5' long, and the bulb grows on, not in, the ground. The plant originates in South Africa.
Ornithogalum thrives in full sun to full shade outdoors or bright light indoors. It prefers rich, well-draining soil. Water when the soil begins to dry and either mulch with well-rotted manure (if the plant is growing outdoors), or fertilize in the spring with a half-strength liquid fertilizer.
Hope this answers all your questions!
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