Question about zones

annbeck62 Posts: 995 ✭✭✭✭

I live in zone 9b. Many times I look through catalogs and find things I'd like to try growing. What I've found is the zone system seems to be about cold tolerance. I need to make sure things are heat tolerant and the sun is a lot stronger here than in many other zones. Is anyone aware of a way to research that when considering planting something new?