Follow the directions which came with the bulb. After the bloom is spent remove the bloom stem and continue to maintain as a house plant until outside temps are above freezing, then plant in the garden in an area protected from afternoon sun. Requires normal water and fertilizer and should be ok in the garden through next winter when the foliage will die back and will recover in the spring and bloom next year about the end of May. Al

I'd like to add that Hippeastrum bulbs, more commonly known as Amaryllis, can be prone to rot and require excellent drainage. I would amend the soil it will planted in so that it's not sitting in soil that will remain too moist for too long.

You are more than welcome to come join us in the Amaryllis Forum, where you will find oodles of great cultural information, lovely photos, and very friendly people who are generous and eager to help!

Here in my zone, some friends grow them in pots and never plant them out. As suggested above, you might want to check out the forum mentioned above. I have linked to it below.

Sue

Here is a link that might be useful: Amaryllis/Hippeastrum Forum