There are a few good reasons to keep your pruning tools sharp. For one thing, it's easier to prune with a sharp blade than a dull one. But more important, a cleaner cut heals faster and more efficiently, resulting in a healthier plant that will be better prepared to fight disease and insect infestation.
If you've ever wondered about how to sharpen pruners, then be sure to check out this video with Lee Reich. Reich is a horticultural consultant and the author of The Pruning Book, published by The Taunton Press.