The green stems are drooping. Is this normal? The soil is moist and the plant sits in the sun.
Drooping stems could indicate the plant is becoming weak from excessive moisture or root problems. Make sure the soil is well-draining in the planting location. Otherwise, the plant could be drooping if it's grown too "leggy" because of over-fertilization or low light.
What would cause my rain lilies not to bloom?
This article will help you with care of your plants.
https://www.gardeningknowhow.com/ornamental/bulbs/rain-lily/growing-rain-lilies.htm
Can they grow from seed?
Yes, but this is very difficult. It is recommended that you grow them from splitting up the bulbs.
Here is an article with a little more information: https://www.gardeningknowhow.com/ornamental/bulbs/rain-lily/growing-rain-lilies.htm
Can I plant my bulbs rain lily bulbs now?
Really, you want to plant these in the fall, but this all depends on where you are located. They need a cold period to break dormancy, so if your area will still remain cold then you should be able to plant now.
Here is an article for more information on these plants: https://www.gardeningknowhow.com/ornamental/bulbs/rain-lily/growing-rain-lilies.htm
zone 5. Wondering if I need to do anything else to assure these will bloom next year. Thanking you in advance!
If you mean that you've just bought bulbs, you may want to overwinter them as instructed in this article: https://www.gardeningknowhow.com/ornamental/bulbs/lily/overwintering-lily-bulbs.htm.
If they are plants, yes, be sure to store them inside in a protected environment. They should be fine in the spring.
https://www.gardeningknowhow.com/ornamental/bulbs/rain-lily/growing-rain-lilies.htm