There are many gardening centers to shop at and catalogs to order from that sell many different kinds of flowers. Roses are a very popular and beautiful flower that many people purchase and enjoy. One of the prettiest is the knock out rose. There is one called the double knock out rose, which is very hardy and is red. It continues to bloom year round. There is also a pink double knock out rose. The rainbow knock out rose bush is a very beautiful one, as well. It may not bloom year round, but is considered one of the best. Many people often use it as a border. In deciding which one you like the most, of all flowers or hedges, a person should always check out the knock out rose. It comes in different colors and types.