Q.Hibiscus Growing and Care
How do I plant a hibiscus outside in the ground and care for it?

Certified GKH Gardening Expert
If you have a tropical hibiscus, you can not plant it in the ground where you live. The will not tolerate the winter where you are. It will need to come in during the winter. This article will help you with that:
https://www.gardeningknowhow.com/ornamental/flowers/hibiscus/wintering-hibiscus-indoors-winter-care-for-hibiscus.htm
If it is a hardy hibiscus, this article will help you with that:
https://www.gardeningknowhow.com/ornamental/shrubs/rose-of-sharon/rose-of-sharon-bush.htm