How can I kill a bush that grows in the middle of a bush that I want to keep?
Cut it down as low as you can then immediately paint the stump with concentrated herbicide like glyphosate. Use a small foam paintbrush. The herbicide will only kill what it touches. If you are worried about the bush touching the stump once you are done, cover the stump with plastic wrap and secure with a rubber band.
I purchased several scrubs and bushes at the end of season garden sale. Should they be planted right away and if not, how long can they stay in their pots if watered properly. Colin
This may depend on your current weather conditions. If you are in a heat wave, it may be beneficial to wait.
Though spring and autumn are good times to plant out most shrubs and trees, you can plant out anytime.
This article references planting trees, but the care needed for shrubs is the same!
https://www.gardeningknowhow.com/ornamental/trees/tgen/watering-newly-planted-tree.htm
I have a few potted bushes and perennials. I usually winter them close to the house. My husband says I should put them on the unheated, enclosed patio. Which is better for their survival. Thank you for your help.
Either is likely a good place to overwinter. In the enclosed patio, make sure the temperatures are constant; you don't want the plants to warm then freeze again.