I highly recommend doing this with a 1m spirit level, but you'll need to work out whether you want it perfectly straight or to match the slight slope of your garden.

So I set up a string line to where we wanted our edging to be. I opted for a simple straight line as I knew I'd drive myself mad aiming for a symmetrical curve. I had to get this part done first to work out the correct notch I needed to cut around the haunching. Tips for Cutting Rubbed Garden Edging If I were to do this again, I'd try drilling through the haunching too first. But at the time, I didn't want to create a weakness. But, once you've taken the time to make sure it's level as best as you can (because there are lots of wonky ones on social media), I think it looks professional. Environmentally friendly; Diverting tyres destined for landfill and turning them into attractive, high quality, functional productsI am an ambassador again this year for WD-40, so have plenty at hand. Other methods could be to rub a candle on the saw, or try a bar of soap! Then I returned with my post hole shovel to scrape out what I'd dug while making the trench wide enough for my rubber edging. Next, I used my string line as a guide to dig a 1-2" trench using an edging tool. The manufacturers recommend 1", but it's very difficult to be this precise. As with all my projects where possible, I did a dry lay to get an idea of where I wanted my lawn edging to be. It's lightweight enough to move around and plan without tiring yourself out too early.

You may want to buy more, depending on your cuts if you prefer their pre-manufactured wholes. I wanted to save money and drilled holes instead. Setting up a String LineUse all year round; Can be left in your garden in any weather, 365 days a year and will remain without any effects from the elements