Hibiscus trees

I have two hibiscus trees, about 4 feet tall that have blossomed all summer long outside. Any possibility for them to adjust to continue to thrive indoors now that the weather is changing? When should I do this? And is there any way to avoid bringing in any insects in with them? I live in Southeastern CT, near the Long Island Sound.

 

FIrst of all, are they in pots? If not transplant them into pots right away, keep them watered well and leave them in the same location where they were so they can recover for a few weeks from the transplant shock.

You can look at the plant for insects. Most important is to look closely at the bottom side of the leaves. Not all insects look like insects so if you see little dots (black, brown, white, red) or little brown scales they are insects. If the plant is relatively free of insects you could just bring it inside. If you suspect insects or just want to be sure you can spray with insecticide before bringing it in. When spraying you must hit the bottom of all the leaves.

When you bring the plant inside are you going to keep it under grow lights or will it be going into a window? What direction does the window face, does it get full sun?