When is the best time to trim hedges? Green leaf hedges June to October Evergreens April to August Conifers and other fast growing shrubs Every 6 – 8 weeks Related articles How do I sharpen the blades on my Hedge Trimmer? Where Can I Buy Replacement Blades for my 24V-GT10 Trimmer? How many blades come with the 24V-GT10? What is the Difference between the GT10 Blades and the Sharper Blade? How do I assemble my 24V-HT22-MAX?