They like to be kept moist. The hibiscus flower lasts only one day.You can gradually get it used to full sun and keep it out of the wind. These braided hibiscus "trees" are tropical and cannot be left out in your zone past a frost.

How do you prevent yellowing leaves on my braided Hybiscus? What kind of food do you feed this type of hybiscus?

Miracle gro liquid feed seems to work really well for mine. In full sun they will have as many as 10 to 20 flowers a day in mid summer, but in your area they would probably burn. Its best if its left on a shaded patio or under a tree.
They make good houseplants for foilage, but rarely bloom unless given a very summy and warm spot. They are best outdoors during the summer and taken in before first frost. Buds form when temperatures are continually warm and the sun is bright. During the fall when temperatures go in the 50s at night you will notice flowers becoming fewer and smaller. Some buds will even fall off. Once the plant flowers are small its time to keep them inside for the winter, unless you live in a frost free area where you can leave them out. Hibiscus can die below 32F, but one of mine has seen 26F and actually recovered. I wouldnt give those temperatures a try.

Good luck