Firethorn, Pyracantha coccinea, is one of our showiest fall shrubs. The first time I saw one I did one of those drive-by double takes, turning my car around so I could get a closer look. Then I said to myself, “I have to have this plant.”
Ask gardeners who have Firethorn in their gardens and you’ll get a wide range of opinions as to its usefulness. The biggest complaint has to do with it’s ½ - ¾” long thorns, hence the common name Firethorn. This is a plant that you want to put in a place where it can grow to its full potential without much pruning. Depending on the cultivar, it can range from 3’-10’+ ft height and spread. It is not advised to shear it and pruning should only be done occasionally to maintain its natural beautiful shape. Believe me, the less you have to prune this the more your arms will thank you. The one exception to this is that Firethorn makes a beautiful espalier! Due to its thorns you would want to avoid putting it right next to sidewalks or other traffic areas unless you want to keep people and animals out of a certain area. Great to keep those pesky neighbor kids from short-cutting across your garden!