You can use colors to complement the flowers in your yard or the paint scheme of your house. We find a three-color wreath to be the most attractive, with plants of a darker color as an accent. For example, if working with impatiens, use two white plants, two salmon or pink colored, and one or two magenta. Purple or lavender and pink and white work well, too. Look for small, compact plants with several buds.
Small plants are much easier to work with than leggy ones, and result in a nicer finished product.
Like any gardening adventure, this is very muddy. It definitely should be done outdoors. Use a table that can be hosed off when you are finished. Soak the green moss in water for 5 or 10 minutes before use. Place your wire wreath base on your work position, with the flowers and moss within easy reach.