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It is not recommended to bring them into a warm house during the winter, as they need a cool dark period to regenerate. You can store the bulbs in the pot, in a cool garage, or cold frame after they start going dormant.

Here is an article with more information:https://www.gardeningknowhow.com/ornamental/bulbs/lily/planting-lilies-in-containers.htm

You can cut down on the watering quite a bit throughout the winter. You will still need to water them, just not as much. Here is an article on their care: https://www.gardeningknowhow.com/ornamental/bulbs/lily/planting-asiatic-lilies.htm

All lilies have a brief but gorgeous bloom time. One strategy is to interplant Asiatic and Oriental lilies. Oriental lilies grow much taller than Asiatic and they bloom in late summer. Another idea is to plant something in front of your lilies like sunflowers that take a while to reach their expected height. While they are smaller, the lilies bloom above them. Cosmos is another annual that you can start outdoors after your frost-free date. They germinate in 7-10 days and like full sun. Sow the seeds around the lilies to hide the yellowing foliage. Do not cut down the lily foliage until it has completely yellowed; the leaves are necessary to rebuild the lily bulb so it can survive winter and bloom next year. I find the foliage attractive as long as flowers are dead-headed but that's me. Choose the annual of your choice that will grow tall enough to hide the lilies.

When lily petals deterioratel, it is a good idea to dead-head the remains of the blossom. This is true of all bulbs. Your hope is that the plant will focus its energies on re-building the bulb for next year's blooms instead of on making seeds. Your lilies may be able to do both or you may end up with fewer blooms next year if you don't dead-head.

Now is a good time to plant lilies. They won't emerge until the soil starts to warm so impending frost isn't a problem. The following article discusses planting and ongoing care: https://www.gardeningknowhow.com/ornamental/bulbs/lily/planting-asiatic-lilies.htm

It looks like a very lovely Asiatic Lily growing in your garden!

https://www.gardeningknowhow.com/ornamental/bulbs/lily/planting-asiatic-lilies.htm