Choosing an ornamental pear: shape first, cultivar second

The ornamental pear became the default Australian street and garden tree for a simple reason: it is very hard to kill and very easy to like. Massed white blossom in early spring, a glossy canopy all summer, autumn colour across most temperate districts, and a tolerance of clay, heat, frost and neglect few deciduous trees match.

So the decision is not which one is toughest. It is which silhouette fits the space, and whether anyone will prune the tree in its first four winters. Get the shape wrong and you live with it for twenty years.

The shapes, from narrowest to widest

Capital is the narrowest pear in the range, a tight upright column on a single leader, tighter than Chanticleer. It exists for the jobs nothing else fits: the strip between a driveway and a fence, a narrow boundary line, a row that has to hide a first floor window.

Javelin holds a similar column with short side branches, and stays narrow at maturity rather than loosening with age. Cleveland Select is the other upright worth knowing, a tight oval that does not lean out into the road. A run of them grows in with far less variation than seedling pears, which councils value.

Chanticleer is the tight teardrop, narrower than the round-headed pears and fuller than a strict column. It handles compacted urban soil, wind, heat and street conditions better than most deciduous trees, and it dominates new estate plantings through Victoria, New South Wales, South Australia and south west Western Australia.

Then the broad crowns, for lawns and generous frontages. Red Spire opens earlier and more thickly than the others here. Aristocrat builds a broad pyramid with noticeably wider branch angles. Winter Glow is the broad one, dense enough in summer to screen a first floor window and holding deep burgundy foliage far later into the cold months than the rest. Bradford is the original street selection, a dense oval crown, uniform down an avenue and casting enough summer shade that whatever goes underneath has to cope with it.

Where you garden changes which one is right

What varies between districts is the autumn, and autumn is half of why people buy these trees.

Late burgundy depends on cold autumn nights. In Orange, the Southern Highlands, the Victorian goldfields, Canberra and the Adelaide Hills, Winter Glow and Red Spire give the full performance. In Brisbane and along coastal northern New South Wales the same trees still perform, but the tones are muted, later and briefer, and the tree may barely go properly dormant. Garden warm and you are buying blossom, density and summer shade.

Manchurian pear is the cold-district specialist. Victoria, the ACT, the southern tablelands and the Adelaide Hills give it the chill that produces dense blossom, while subtropical flowering is thinner and the autumn colour unreliable. Pears run well through the south west of Western Australia too. On the calcareous sand behind the Perth coast the constraint is not cold but moisture in the root zone for two summers.

Structure: the question that decides the cultivar

Buyers skip this part and arborists talk about nothing else. Callery pears form tight, upright branch unions with bark squeezed inside the fork. Those unions have very little real wood in them, so a mature limb tears out in a summer storm fifteen years on and takes a good share of the crown with it.

Two or three seasons of formative pruning solves it permanently. One dominant leader. Scaffold limbs spaced along the trunk rather than bunched at a single point. Anything in a sharp V union taken out while the cut is small. Do it in late winter, when the branch angles are easy to read.

If nobody will do that work, choose for it. Aristocrat carries wider branch angles, and the forked crotches that fail in some Callery selections are less common on it. Cleveland Select improves on the older Bradford the same way, with branching better spaced and more securely attached. Manchurian Pear needs the same early attention.

Never top a pear; it produces a thicket of weakly attached regrowth. And go easy on nitrogen, because soft growth loads weight onto the unions most likely to fail.

Spacing an avenue or a screen

The classic pear job is the driveway avenue and the classic error is planting it too tight. Trees at half the right spacing look full for five years, then spend fifteen being hacked into each other.

Set the row at least 2.5 m off the drive edge for narrow forms, so the canopy overhangs the drive rather than the trunks crowding it. One repeated cultivar at even spacing. Resist the mixed row.

Seedlings, and where not to plant a pear

The small fruit is often written off as a non-event, and that is not quite honest. Callery selections cross-pollinate freely, so a Red Spire within bee range of a Capital or a Chanticleer sets viable fruit, birds carry the seed, and seedlings have naturalised along creek lines, rail corridors and roadsides in parts of Victoria and New South Wales. A seedling reverts to thorny wild growth that is unpleasant to dig out once it has a taproot.

One tree in a front garden is a different proposition. But check your council or state weed listing before a rural, public or long-run planting, keep pears off blocks backing onto bushland or a watercourse, and pull volunteers small.

Bare root, containers and size grades

Pears transplant as easily as anything in the deciduous catalogue. Bare root stock is lifted in winter while dormant and goes straight into prepared ground, which is the economical way to plant a long run. The catch is timing: the ground has to be dug and ready before the stock lands. Entry pricing sits low across the group, with Bradford opening at $39.95 and Aristocrat, Winter Glow and Red Spire from $50.95.

Containers cover the other end. Capital runs from a 200mm pot, roughly 4.4 litres of rootball, up to 750L at $5169.00. A 300mm pot is about 15 litres, a 400mm about 35. That number is the pot, not the height of the tree. Small grades catch up quickly and suit long runs; 100L stock is the shortcut when the driveway is finished and bare. See our guide to what advanced trees actually means.

Planting and the first two summers

Winter is the natural window while the trees are dormant, though container stock establishes in any season with water behind it. Dig wide rather than deep and plant at the level the tree grew in the pot. Stake low and loose for the first year in windy positions. Mulch to the drip line, clear of the trunk.

Water deeply once or twice a week through the first two summers. Feed lightly at bud break with a balanced complete fertiliser. After that, pears run on rainfall across most of temperate Australia. More in our guide to planting an advanced tree.

What goes wrong

Pear and cherry slug is the pest you will meet. The small dark sawfly larva grazes the upper leaf surface and leaves the canopy skeletonised and brown by midsummer. A screening row full of brown leaves defeats the point. Hose them off with a strong jet, dust the foliage, or spray at first sign, and expect a second generation later.

Shade is the other common failure, and it costs you the reason you bought the tree. In half shade the blossom thins and the autumn colour never really arrives. Snow pear loses its silver felt and falls back to plain green. Full sun is not a preference on this genus.

The specialists: silver, small and cold

Snow Pear does something no other pear does. Dense white felt on the new shoots and leaf undersides makes the canopy read pale grey, which lifts anything dark planted behind it.

The Weeping Silver Pear is a different plant altogether. Worked onto a stem, it finishes as a wide silver mound with branch tips sweeping to the ground. Thin the crossing and downward shoots inside the canopy each winter, or they trap moisture and bring on early leaf fall.

Westwood Korean Sun is the small one, a low rounded spreading head rather than the upright shape most people picture, usable in courtyards, on narrow verges and under power lines. It will not hide a two storey wall.

Manchurian Pear sits outside the Callery group: a pyramidal head that broadens with age, and a tolerance of frost, wind, compacted soil and poor drainage that put it into thousands of Australian subdivisions. It is not exempt: small fruit drops and raises seedlings in nearby beds.

What to plant with it

A deciduous avenue is bright underneath in winter and shaded, root-filled ground in summer. Plant for the summer.

Under the broad crowns, lomandra handles dry shade beneath trees, at three to five plants per square metre. Liriope and mondo grass give a finer edge, liriope at 30 to 40cm centres and standard mondo at 20cm. For a formal avenue in a cool district, a clipped box line under the trunks is traditional; in warm coastal gardens take Japanese Box, since blight is worse where foliage sits wet in humid air.

Behind a silver-leaved pear, plant something dark. The grey only reads as grey against a green hedge, a rendered wall or dark-leaved hedging. More ideas in our guide to plants for shade.

When to buy a different tree

Walk away if you want fruit to eat; the fruiting varieties have different needs entirely. Walk away if your block backs onto bushland or a creek line and you were planning a row. Walk away if you need evergreen screening, because a pear is bare for a stretch of every winter. If blossom is the point and your winters are genuinely cold, compare the flowering cherries and crabapples, though both want sharper drainage than a pear and neither suits a bushland block.

The full range is on the pears collection page, with larger grades in advanced trees, and alternatives for comparison in feature trees. Every order ships farm-direct with flat $99 delivery in QLD, NSW, VIC, SA, ACT and WA, a $399 minimum order, and the 30-Day Healthy Plant Guarantee.