First of all, you should know whether your garden remains under direct sunlight all the day or there remains shadow. Also observe the ration if your garden remains under both, sunlight and shadow, on different timings of the day.
You should do research online about the different types of flowers that can be planted in a place under direct sunlight or under shadow of both.
You can also visit the nearby garden shop or greenhouse where experts will help you in making the right selection of flowers for your garden. It will help you in buying only those flowery plants which will grow well in your garden.
If a small part of your garden area has direct sunlight whereas another part is under shade and a third part is under partial shade and partial sunlight, then you have to buy different flowers for all these parts separately.
Time and effort are the most important aspects for growing a beautiful garden. There are many flowers that need more care and time but there are also flowers that can be grown by spending less time. You should buy flowers by keeping in view that how much time you can spend for looking after these flowers.
You should also draw a map of your garden on paper before you buy flowery plants. Not mark the spaces where you want to grow plants by keeping in view that every plant can be given enough space to grow well. You can show this map at the garden shop which will be more helpful for you in buying right type of flowers.
You should also examine the soil of your garden area because many flowery plants do not grow on a certain type of soil. Try to take help from experts at garden shop who will guide you about what type of flowers you can grow easily in your garden.
After getting knowledge about the flowers, you should check the prices of these flowers by going to different garden shops. It will help you in getting healthy flowery plants and possible on reasonable price.
Do not compromise on the health of flowery plants and only purchase those ones that have healthy stems and leaves. These plants will grow well and will produce more flowers as well.