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Landscaping & Gardening

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

Landscaping & Gardening

Garden Experts: Dealing With Blackfly

Regardless of your level of expertise in the garden, pests will always be your nemesis. Fighting slugs, snails and flies of all range of colours is a daily battle for gardeners; planting and watering are just the beginning. This week, we take a look at the dreaded curse of the bean: the blackfly, and how you can get rid of them naturally.

Regardless of your level of expertise in the garden, pests will always be your nemesis. Fighting slugs, snails and flies of all range of colours is a daily battle for gardeners; planting and watering are just the beginning. This week, we take a look at the dreaded curse of the bean: the blackfly, and how you can get rid of them naturally.

What are blackfly?

Also known as black been aphid, blackflies are particularly partial to beans – especially broad beans, but can also be found on other plants, such tomato plants. They suck sap from plants and can build up very quickly on delicate young plants.

Signs of blackfly

Black bean aphids are very small – up to 2mm in length and mostly black. They can appear very suddenly and amass quickly on stems and under the leaves of younger plants. If left to continue to build up, blackfly can stunt the growth of your broad bean, kill the flowers and prevent beans from developing, or cause poor quality beans.

Getting rid of blackfly

The secret to successful gardening goes far beyond planting and watering; husbandry is vital. Most creatures – even the annoying ones – are part of a delicate ecosystem. Your aphids may be eating your broad beans, but they will also be an important part of various food chains. If your blackfly population is getting out of control, there are a few things you can do:

Wash them off

Blasting the blackfly off with a hosepipe or gently washing them away with a damp cloth are both easy and effective ways to get rid of blackfly; literally all you need is water, a cloth, and a LOT of patience. If you can’t use a hose, get a good spray bottle and fill it with water, a splash of washing up liquid and a teaspoon of cayenne pepper. A daily spray for a week should see the infestation clear up, but consistency and patience are key.

Bring in the birds

Blackflies make a delicious meal for birds. Entice birds into your garden with a bird bath, and feeders all year round and they will repay your hospitality by eating your blackfly.

Cover up

Fabric covers in greenhouses and polytunnels can protect your delicate plants from blackfly.

Watch your nitrogen

Like many elements of nature, gardening is about balance. You want nitrogen-rich soil to produce delicious fruit and vegetables, but too much nitrogen encourages plants to produce the sap that attracts blackflies. If you are consistently struggling with blackfly, you may want to try reducing the nitrogen content in the soil.

Get professional help

Sometimes, just a little professional help is all that is needed to get on the right track. A skilled gardener will help you to get the balance just right so that your garden is able to thrive.

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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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