Container plant collections offer an economical way to buy lots of flower bulbs and to grow different flower colors. Dutch Gardens offers several different collections of bulbs and perennials that are suitable for growing in containers. Container gardening is a great option for gardeners with limited garden space, as well as gardeners who want to brighten patios, decks and porches with plants. When buying plant collections online, note the plants' mature height and spread. Also, determine the size of the container you will need for the collection. Next, select a container large enough for the collection and also one that offers suitable drainage. Other factors to consider are the plants' sunlight requirements and bloom times.