9 Root-Balled Yew Units Set on a 20-Metre Line from Practicality Brown

What 2.2-Metre Centres Say About the Plants

Nine plants over 20 metres gives wide centres for hedge work. A young bare-root Taxus baccata whip for a quick screen would usually go in at three to five plants per metre. Root-balled units at 2.2-metre centres are a different item: mature specimens, often with 100 to 150 centimetres of clear stem and a burlap-wrapped root ball that two people struggle to lift.

Practicality Brown, a Buckinghamshire grower supplying instant hedging to commercial and private sites for decades, sells this format for projects where the line needs to look established on the day it is planted. The size of the stock changes the ground preparation. Each root ball may weigh 40 to 80 kilograms wrapped, so the pit needs at least 20 centimetres of extra width on every side. The base has to be firm enough to keep the plant at its original soil level.

A drop of three centimetres below the old soil mark can invite collar rot at the base of the stem. The spacing also leaves visible separation at first. The run begins as nine cones or columns, then grows toward a single face over two or three seasons.

Pits, Clay, Hessian, and the First Watering

Root-balled yew moves best while dormant, from late October through March. The plant is not pushing new growth during that window, and the ball holds together more reliably during handling. Dig the individual pits, or a continuous trench, a day or two before planting so the opened soil has time to breathe.

Heavy clay creates the classic sump failure: a smooth-sided hole fills with water and the roots drown. Fork the sides and base to break any glaze left by the spade. On a genuinely wet site, raise the whole line 10 to 15 centimetres above grade.

Most reputable growers, including Practicality Brown, use biodegradable hessian over a wire basket. Set the ball in the pit first. Then loosen and fold back the top third of the hessian, and cut the top rings of the wire cage. The rest of the basket stays in place because removing it can shatter the ball and sever the fine roots the plant depends on.

Backfill with the excavated soil. A pocket of rich imported compost inside native clay can hold water around the root ball like a sealed planting basin. Firm the soil in stages, then water each plant with 20 to 30 litres to settle soil around the ball. Anything over 120 centimetres should be staked against wind rock through the first winter.

The Drip Line Carries the First Two Summers

A freshly lifted root ball has lost most of its feeding-root network. During the first two summers, the plant draws almost entirely on the soil inside that original ball, and that volume dries faster than the surrounding ground. July browning on instant yew hedges often starts there.

Lay a 16-millimetre drip line along the base of the run. Give each plant two pressure-compensating emitters delivering around 2 litres per hour. A battery timer running for 45 to 60 minutes, two or three times a week in dry spells, gives a starting schedule. Check moisture with a finger 10 centimetres down so the actual ball, rather than the surface mulch, sets the decision.

Pressure-compensating emitters matter across 20 metres because the last plant receives the same flow as the first. A cheap non-compensating line can starve the final two or three units, and those are the plants that turn yellow in August. Mulch 5 to 7 centimetres deep over the line, keeping mulch clear of the stems, and the same water goes much further.

Box Blight Is the Wrong Disease Name

Formal evergreen planting has made many buyers anxious about box blight, the Calonectria pseudonaviculata fungus that has hollowed out box parterres across the country over the past decade. Yew does not get box blight. In wet ground it can get Phytophthora root rot, which is why drainage work belongs at the centre of the installation.

Turning Nine Specimens Into One Formal Line

Yew tolerates hard pruning better than almost any conifer. That quality is a large part of its long use in formal English topiary, including the seventeenth-century gardens at Levens Hall. It can be cut back into old bare wood and break new growth, a response leylandii and most cypresses will not give.

Leave the shears alone in the first season. The plant needs to establish roots before spending energy on recovery from cuts. From the second summer, one formative trim in late summer is usually enough, commonly from August into early September. Once settled, yew grows slowly, around 20 to 30 centimetres a year.

Cut to a slight batter. The base of the hedge should sit wider than the top so the lower foliage still catches light. Without that shape, the lower face can thin and turn bare.

A cordless trimmer makes a 20-metre run easier to control. The Stihl HSA 100, with a 24-inch double-sided blade, runs on the AP system battery and holds a straight cutting line better than a petrol unit vibrating in the hands. That matters when the aim is a plumb face on a formal hedge.

Set a string line at the target height and another at the base width before cutting. Across 20 metres, the eye misreads level, and a hedge trimmed by feel can drift by several centimetres from one end to the other.

Collect the clippings. Yew foliage and seed are toxic to horses and livestock, and the trimmings keep that toxicity even after drying. A pile left near grazing is a genuine hazard.

Over three to four years, the nine separate balls of foliage meet. At that stage the whole run can be clipped as a continuous form. The 2.2-metre spacing then shows its purpose: enough plants to close the gaps, with each specimen having had room to build a dense root plate.

The Slow Part After the Lorry Leaves

The photograph used to sell root-balled yew shows a finished hedge, and nine mature units on a 20-metre line can look impressive the afternoon they go in. For the first eighteen months, much of the work happens underground as the plants rebuild the root system lost during lifting. Above ground, they may barely move.

A buyer expecting obvious year-one growth can read that stillness as failure and respond with too much water or too much feed, which can push a healthy establishing yew into root rot. The delivery note leaves the turning point unstated, the year when checking gives way to ordinary clipping and the line starts to feel settled. With clean drainage and steady irrigation, that change usually arrives later than the afternoon installation suggests.