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I would check Craigslist in your area. This would be a good place to start. A google search may possibly bring you to services in your area as well. You can include some photos of them on this site, and I will help you to identify and find articles to care for them as well.

This article will help you with this task!

https://www.gardeningknowhow.com/houseplants/hpgen/acclimate-plants-indoors-winter.htm

Unfortunately, this can be very hard unless I know, specifically, which plants. If they are native to your area, then they can survive with no protection. If they are not native but only slightly out of zone, then they can survive with light protection. If they are way out of zone, however, then you will not be able to get them to survive the winter outdoors.

If you can tell me the types of plants, then I can better help you.

Appropriate watering is the key issue. And keeping the soil root ball intact when you transplant. Don't let it dry out during the move or after, water right away in the new pot.
Right now, check the soil moisture content. I like a soil moisture meter to help take the guesswork out of when to water. https://www.domyown.com/luster-leaf-rapitest-mini-moisture-tester-1810-p-7732.html
When the soil is wet, poke a straight trowel or stick down in around the inside of the pot to be sure the backfill soil is all settled and there are no air pockets.
If you can get some Superthrive, put a dash in when you water. I swear by it for helping to avoid transplant shock and for recovery.
https://www.domyown.com/superthrive-the-original-vitamin-solution-enhanced-with-kelp-p-9474.html

There are quite a number of possibilities here. This article will help to get you started: https://www.gardeningknowhow.com/houseplants/hpgen/indoor-plants-that-need-low-light.htm

Unfortunately, there is a lot of information missing. You don't mention what the plant is, in question. That will determine the care required, and the reason behind the bloom drop.

Many plants will do this in response to a drastic change in environment. Be sure to match the plant to where it came from, so that you can be sure that it will survive in its new location.

https://www.gardeningknowhow.com/houseplants/hpgen/acclimate-plants-indoors-winter.htm