new bushes and i dont know what to do
Thanks for writing. In your area, you should be able to leave the hydrangea and rose of Sharon be for the winter; they should be just fine without doing anything to them. The gardenia, though, is not hardy in your area --- so you'll either need to treat it as a houseplant or consider it an annual and let it die once freezing temperatures arrive.
---Justin, Senior Garden Editor, BHG.com