You wouldn’t dream of moving into a house without taking a look at the area. It’s the same in a garden. Before you can grow anything, you need to know what sort of conditions you have. Then you can choose plants that are suited to them. There really is no need to waste money on plants that will hate your environment.
You’ll need to know what sort of soil you have, how much light there is and the prevailing weather conditions. Is it a windy site, a particularly cold one, or is it sunny and sheltered?