The answer to 'DIY hedge' is that you can maintain and trim your hedges yourself with the right tools and techniques. Hedges require regular trimming to keep them looking neat and tidy, usually every 4-6 weeks during the growing season. Start by using sharp, high-quality hedge trimmers to carefully shape the hedge, cutting the sides and top evenly. Be sure to wear protective gloves and eyewear, and work carefully to avoid injury. It's also important to dispose of the trimmings properly and clean up any debris when you're finished.
If your hedge is overgrown or needs more extensive work, it's best to call in a professional landscaper. They have the right equipment and expertise to safely and effectively maintain larger or more complex hedges.