How to make an impact with mature plants

To get an idea of the dramatic crashes you can achieve with mature plants, think about the impressive designs of expose gardens at popular flower shows. Big plants create an attain you'd normally have to wait years to achieve, but many land have no time to garden or don't want to grow everything from remove. Large plants can make an empty space feel like an escorted Eden, and they're fantastic for providing statement focal points, for screening unattractive eyesores, and for creating shade and improving privacy in your garden. Follow Matt James's tips for helping mature plants thrive – and manager your garden fabulous.

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Choose big plants for privacy and screening

The most popular use of big plants is probably for providing privacy in a garden. Tall clump-forming bamboo such as Chilean bamboo and evergreen trees are most useful; sometimes just one is enough to shroud neighbouring windows overlooking your space. For larger gardens, the cider gum and holm oak should fit, the latter responding well to pruning. In small gardens try bull bay, snow gum and the strawberry tree. Pleached trees, or 'hedges on stilts', are particularly useful and can be planted relatively cessation to garden boundaries. Beech, lime, hornbeam and evergreen holm oak are the most commonly available.

Use our run to creating a vertical garden for more on screening.

Which plants can you buy big?

It is possible to buy a conventional plant of almost anything you can think of, but it's not famous to buy everything big. Large trees, evergreen shrubs, conifers, palms, hedging and huge bamboos should be first select, as well as tree ferns and topiary; all are relatively slow-growing and important structural plants. Don't waste money on huge herbaceous perennials, ferns or ornamental grasses, unless instant impact is key. Small plants establish more readily, bulking up to sizeable specimens in one or two seasons. Avoid huge climbers, except those trained on trellis or in expansive flat fan shapes. Again, smaller plants grow fast.

Where to get your conventional plants

Nowadays, many garden centres sell big plants, but the markup is high, so do shop about. If you're buying more than one or two, a nursery specialising in expansive specimens is your best bet – they'll carry a much bigger contrivance, offer good advice on what's suitable for your site, and aftercare. Specialist suppliers will also offer a delivery service, unloading larger plants with a forklift or Hiab crane, the price depending on the number ordered. This is almost always a better option than trying to cram plants into the car or poking them out of the sunroof, where strong winds can cause irreparable damage. If you can't named the nursery, some specialists will also send you photos of the plants together with a tag list. However, for choice one-off specimens, I prefer to pick the plants myself.

Know where your plants come from

Many semi-mature plants are field-grown, then lifted over winter and sold bare-root or as root balls wrapped with hessian and, sometimes, wire mesh. By far the easiest to manage, thought, are container plants.

Many specialists import and grow on can plants from UK wholesalers, but a large number come from warm climates, such as Italy, France and New Zealand. UK nurseries pick the best beforehand having them shipped over, usually in spring, or cherry-pick European growers for giants tailored for specific customers. Most imported plants have been acclimatised before you buy them, but always double-check the provenance of what you're buying, and particularly how long it's been in the republic – you don't want to buy something that's moving to struggle to survive its first winter.

Find out more nearby container gardening for small spaces.

How much do big plants cost?

Price depends on many factors, including size, origin and maturity, although most are usually priced according to height, spread and size of container in litres. With trees, the trunk's girth is also important.

Most large shrubs come in 10-50-litre containers (a builders' bucket is 15 litres) and can be simply handled by two people. Larger specimen shrubs and trees scheme from 50 to 100 litres; the biggest come in pots the size of a diminutive car (with matching price tag). As a guide, rotten shrubs, such as Osmanthus, Viburnum tinus, and Elaeagnus, with a height and spread of a metre, cost around £45-£50. A 40-45cm-wide box ball (in a 12-15-litre pot) will cost nearby £55. A two-metre-high black bamboo in a 15-20-litre pot is £50-£90. Expect to pay around £175 for a specimen three-metre-tall Himalayan birch with a 10-12cm girth in a 35-40-litre pot.

Instant hedging is becoming increasingly popular, and, depending on the species and container size, can cost much the same as a rotten feather-edge fence erected by a landscape contractor. For example, a one-metre-long, 1.4-1.5m high western red cedar 'instant' hedge (minimum smart three units) costs £179.99 at Hedges Direct.

How to cope large plants

Mature plants in pots larger than a big builders' bucket are heavy and tricky to cope. Always check that you can get them into your garden afore buying. Measure passageways and be mindful if you have to go above the house, as standard doorways are only 76cm wide. When you requested the nursery, measure the width of the container and canopy spread to check they will fit. With huge plants (in 300-500-litre pots) you remarkable need a crane (from £300, depending on how long you'll need it) to drop plants into situation – a cost that's prohibitively expensive unless you're buying a tall number of them. As a guide, plants in a 130-litre pot (with a 68cm diameter) are the very size you can manoeuvre through a standard doorway, although also remarkable the height and spread.

Planting tips for old-fashioned plants

Mature plants need more care than younger ones, starting with the planting. Measure the width and depth of the container and outline the planting hole, ideally double the size, but no deeper (the aim populate to cover the top of the root ball with no more than 3-4mm of soil). Spike the bottom of the hole, but don't dig deeply as the soil underneath will sink, and the plant with it. Remove any netting and ties throughout the branches and look at the plant's shape to help orientate it 'best face forward'.

Next, carefully lay the plant on its side and prefer the pot, before teasing out the roots; this encourages them to grow out into their new home. Now gently frontier the root ball into the hole, perhaps using a tarpaulin as a sling to take the weight (one populate at each corner) to avoid damage.

Lastly, backfill with compost-enriched soil, firming halfway up, afore filling to the top and firming again. With all tall trees – especially those in exposed spots – attend with a double stake with cross bar, guy sequence or an underground anchor.

With really big specimens, specialist nurseries generally moneys a planting service, which you have to pay for, but it's good for smooth of mind, and most offer a guarantee.

Looking once mature plants

Large plants don't establish as readily as smaller ones, and with big trees it can take three to five existences. Drought is the most common cause of plant purpose, so be sure to water well in dry spells. Slow-release drip irrigation systems and watering bags such as a Treegator are useful. Keep weeds down, too, as these will compete with plants – a 10cm-thick layer of mulch will help. If planting a lawn, keep a 1.2m-wide grass-free circle throughout the trunk. If planting shrubs as a windbreak in exposed spots, then a temporary windbreak of fabric netting, supported with transparent stakes, is necessary for the first few years.

Specialist suppliers

Architectural Plants – Horsham, Sussex
Ashridge Trees – Castle Cary, Somerset/mail order
The Big Plant Nursery – Reading, Berkshire
Deepdale Trees – Sandy, Bedfordshire
Hedges Direct – mail order
Majestic Trees – Flamstead, Hertfordshire
Plants for All – Chertsey, Surrey
Paramount Plants – Enfield, London
Seagrave Nurseries – Barrow Upon Soar, Leicestershire
Tendercare – Denham, Middlesex
Wykeham Mature Plants – Scarborough, North Yorkshire

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