Learning the Nitty-Gritty of the Florist Business: Before starting a florist shop, some of the first things you have to learn are the details of the business, such as―how to get a steady supply of flowers, accessories and plants, how to make professional looking flower arrangements, and of course, how to advertise and market your products. Check out various books or websites online for flower arrangement ideas, and use your own creativity to make unique arrangements and bouquets.