Tipps, wie Sie Ihrem Rasen neues Leben verleihen

I’ll try to give the simplest solution. You’re going to get a lot of advice that will over egg the situation.

First, fixing a lawn is a process. There’s no way to do some single activity and fix things. So you will be doing work now that will show improvement in spring and summer next year.

Good news, this will be fixed with simple tools and easy maintenance tasks

Get your mower sharpened. Either learn yourself if pay for a service. Blunt blades bash the grass and strip it, leaving long dead brown fibrous leaves that will rot and die creating thatch and dead patches.

Get a good metal spring rake. Rake the lawn BEFORE you cut it. This will remove some thatch and will pull grass upright and give you a more even and better quality cut. It also stops tangled lateral growth.

Give it a really good, like really really thorough raking. Do this now and do it a few times in the year. This should be a particular job that is done very very thoroughly in autumn. This removes dead material and thatch. Thatch causes the leaf to grow from the top of the thatch instead of from ground level. You can end up scalping out the growth base or with blunt blades actually just pull tufts out by the roots. Creating more bald spots and thatch.

Consider buying a £40 electric rake/scarifier to make it less manual labour.

Cut it often and little. Basically 90% of all lawn problems are improved with regular cutting. Don’t scalp the lawn or cut too low. It’s not a bowling green and will never look like a bowling green. Bowling green have a full time employee working in them every day of the week. This is unfeasible for a domestic lawn. Cutting will encourage more healthy growth and spread, helping to fill the gaps. Make sure blades are sharp.

After raking or scarifying in autumn put down some seed. Scatter thinly, don’t over seed.

Maintain this schedule going forward.

Next year think about applying a weed and feed. Or preferably just care less about small of insignificant weeds. As long as it’s green it looks fine. But maybe you want a nice neat grass only lawn. Just follow product instructions, but maybe use it half as often as the product suggests, or less so.

Come back next year for more advice.

Keep cutting regularly and water regularly too, sometimes we think that if it has rained then we don’t need to but this is not true. Also you say it has been fertilised but with what? Most synthetic fertilisers are washed out fairly quickly and are often only effective for growing plants- your soil is what requires to be fed so it becomes a suitable growing area. I recommend that you use granulated seaweed as it is an excellent soil improver that helps to build up a good humus which in turn helps to create a good environment for all of your soil builders- think worms, micro organisms etc. when a plant has a problem it is usually always its growing medium that is insufficient. Healthy soil grows healthy plants which can also make them resilient to other external problems like aphid attack/ disease.

Just leave it, it will sort itself out

Rake out all the dead grass cut very short, as short as your lawn mower will go and over seed. I would over seed and add some topsoil with seed to the patches. Keep it wet with a sprinkler, I would do this for 1 hour ever evening and cut every 2 to 3 weeks. Once the seed is estaished cut every week especially during the summer. In autumn add a feed/weed killer treatment to keep it looking good.