Take good care of your garden hedges

Hedge trimming is almost always best done during spring. A couple of hedge variations might withstand cold and frost, but most will react poorly to having new cuts exposed to low temperatures. During summer you can fine-trim as much as you want, periodically snipping outgrowth during the growing cycle will encourage growth and make it branch upwards. If needed, do two major trims – one in the middle of summer and the other towards the end

Be careful when choosing what tools you use. Cheap tools often loose their edge fast and a dull blade can do more damage than good by squeezing while cutting, thus getting in the way of the healthy re-growth.

To trim your hedges into an even, beautiful shape, you might want to use strings (or a measure laser) as guidelines. First you get rid of the ”main offenders”, large branches sticking out, then get down to the fine pruning. Hedge sides should be trimmed wider at the base to provide maximum light and sun for the exposed leaves. The hedge should resemble a vase turned upside-down. 
So, what has to go? If you’re trimming it down for regrowth you can focus on long branches in the middle whereas if you’re just ”fine-tuning” you can concentrate on shape, evenness and thinning out. Start from the top and work your way downward. Also remember to fertilize the hedge to give it energy and to stimulate further growth.
With these few tips – and a bit of old-fashioned, hands-down work – you should be able to achieve a good-looking, healthy hedge with a minimum of trouble!
Good luck!