How to Make Your Lawn Thicker with AskWickesSubscribe to the Wickes YouTube channel here. Start by mowing your grass to lower than 2-inches and sow seed over the grass. Steps For Seeding A Lawn In 2020 Fall Lawn Care Lawn Care Seeding Lawn A general rule is to never cut more than one-third the length of the grass blades. How to thicken your lawn . By applying grass seed over an existing lawn you can help fill in bare spots and reinvigorate your lawn. Using the back of a rake gently press it into place and cover with a thin 14 layer of compost. Wait one to two hours after watering to allow the. Look for a type of grass that has a high turf density and grows fine leaves. This will help keep your grass seed moist and will also feed your lawn. He breaks down the lawn treatments step by s. Aeration is a great way to loosen compacted soil so that more fertiliser and oxygen can get down to the grass roots. After watering see how deep water penetrates the soil. This will ...