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Landscaping & Gardening

Top tips on all things garden design, including fencing, lawn care, planting and outdoor improvements.

Landscaping & Gardening

In The Garden: Composting Weeds

Home composting is a great way to reduce organic waste and add nutrition back into your garden. However, composting isn’t just as simple as chucking everything in a corner of your garden and waiting for it to break down; there are some rules that need to be followed in order to get the most out of it.

Home composting is a great way to reduce organic waste and add nutrition back into your garden. However, composting isn’t just as simple as chucking everything in a corner of your garden and waiting for it to break down; there are some rules that need to be followed in order to get the most out of it.

One common question that professional gardeners are often asked is “can you compost weeds”? The short answer is “yes”, but if you are going to compost weeds, it is essential that you are composting correctly. And, yes, there really is a right and a wrong way to compost.

A properly maintained compost pile is more than a rubbish dump at the end of the garden. The composting process, when done correctly, should result in enough heat being produced to kill weeds and seeds, as well as other potentially harmful diseases. If your compost heap doesn’t reach sufficient temperature, there is a possibility that perennial weeds and seeds will regrow either in the heap itself, or in your beds when you use the compost. Here’s what you need to know.

Are all weeds the same?

Just like plants, there are many types of weeds. These are: perennial, biennial and annual. As with plants, perennials tend to last a long time, biennial a couple of years, and annuals tend to have a life cycle of about a year. To eliminate the risk of weeds returning in your compost pile, you need to make sure that the weeds – and their seeds - are completely dead.

Composting weeds

Hot composting is the ideal solution, but if you are unable to get your compost balance just right (few amateur gardeners do, without professional help), you could try drying or cooking your weeds, or soaking them in water.

To dry or cook your weeds, you can literally leave them to completely dry out in the sunshine and let the sun cook them. Water compost involves leaving your weeds in water for at least three weeks, after which time the nutrients from the weeds will be in the water. You can dilute this “weed tea” and use it as a liquid fertiliser, placing the residual plant matter on your compost heap.

It is especially important that you completely kill both the weed and seeds of perennial weeds. These have the ability to regrow the roots, so could soon take over your compost heap; and life is definitely too short to weed your compost! Perennial weeds include dandelions, brambles, butter cups and dock leaves. While not always desirable, these plants do have a role to play, so if you are able to, it may pay to keep an area natural. You can always add other flowers to create a meadow area in your garden and attract wildlife.

Do you need advice on any element of your garden design and maintenance? Find a local trusted gardener near you on Trust A Trader. For more tips, join our community on Facebook or Twitter.

Looking for more landscaping & gardening advice?

Find clear, practical answers to common landscaping & gardening questions, helping homeowners understand everyday issues, know what checks they can carry out safely, and when it is best to contact a qualified professional.

  • Do I need a professional to design and landscape my garden?

    For simple stuff - planting, basic lawn care, a few raised beds - you can often manage it yourself. For anything involving hard landscaping, drainage, retaining walls, or changing ground levels, get a professional involved.

    Badly built retaining walls and poor drainage cause expensive problems. A landscaper will also know which materials will actually work for your soil and conditions.

  • What is the difference between a landscaper and a gardener?

    A gardener looks after your garden on an ongoing basis - mowing, pruning, planting, general upkeep. A landscaper creates the garden in the first place - patios, paths, fencing, decking, drainage, planting schemes, the whole structure. Some people do both, but they're distinct skill sets.

    If you want the garden transformed rather than maintained, a landscaper is who you need.

  • How do I get rid of an overgrown garden?

    It's often more work than it looks. Beyond cutting things back, there may be significant root systems to clear, possibly invasive species to deal with (Japanese knotweed needs specialist handling), and ground prep before any replanting can happen.

    For anything seriously overgrown, professional clearance is going to be faster, more thorough, and safer than tackling it yourself.

  • What time of year is best for garden landscaping work?

    Hard landscaping - patios, paths, decking, fencing - can happen most of the year, though very wet or frozen ground causes delays. Planting is best in spring or autumn when things establish more easily.

    If you're planning something big, book a landscaper in late winter for spring work - good ones fill up fast once the season gets going.

  • What should I do if I have Japanese knotweed in my garden?

    Take it seriously. It can damage buildings and hard surfaces, and some mortgage lenders won't lend on properties where it's present and unmanaged. You're not legally required to remove it as long as it stays within your boundary, but you are responsible for stopping it from spreading to neighbouring land.

    It needs specialist treatment - either chemical treatment over multiple growing seasons, or excavation and licensed disposal. Don't compost it or put it in your general garden waste.

  • What are the benefits of artificial grass?

    The obvious one: no mowing. It stays looking decent all year and doesn't turn to mud in winter, which is a real plus for households with kids or dogs. Modern artificial grass is much more realistic than it used to be and holds its colour well. Worth knowing though: it gets noticeably hot in direct sun, needs occasional brushing, and is made from plastic that can't currently be recycled at end of life.

    It's a great fit for a low-maintenance, practical space - less so if the environmental benefits of a real lawn matter to you.

  • How can I make my garden low-maintenance?

    Cut down the amount of lawn first - it needs more regular attention than almost anything else. Swapping sections for hard landscaping or planted beds with ground-cover plants makes a real difference.

    Pick plants that suit your soil and aspect - ones that are happy where they are will largely look after themselves once established.

    A thick bark mulch layer keeps weeds down and holds moisture. A drip irrigation system on a timer removes another regular task. A good landscaper can design a scheme specifically around low maintenance rather than just what looks attractive.

  • Do I need planning permission for decking, a pergola, or a garden room?

    Decking is usually fine under Permitted Development as long as it's no more than 30cm above ground and doesn't cover more than half the garden. Open pergolas are generally okay - but start enclosing them with a roof and sides and they get treated differently.

    Garden rooms are classed as outbuildings: permitted if single-storey, within size limits, not used as living accommodation, and set back properly from boundaries. Listed buildings are a different matter - any structure nearby needs listed building consent. If you're not sure, a quick inquiry to your local planning authority will give you a clear answer before you spend anything.

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