Topiary and standards: what you are paying for and how to keep the shape

Most people come to topiary after trying the other way first. They planted small box in pots, trimmed the tips, and three seasons later have shrubs with a rounded top, thin sides and a gap on the shaded face. Buying a shape already made is a different transaction from buying a plant you intend to shape yourself.

A trained plant is a different product from a nursery shrub of the same species. The clipping is the point. A ball in a 500mm pot has been cut back, turned and cut again on a cycle for years, so the outer surface carries dense growth on short internodes. That is what makes a form read as solid rather than as a bush someone rounded off. You are buying the accumulated cuts.

What the grades on a listing tell you

Pot size comes first. On a ball or cone it is a fair proxy for the diameter of the shape and the seasons of clipping behind it. English Box topiary balls run from 250mm pots up through 400mm, 600mm and 800mm, then into 50L, 70L, 90L and 100L. Moving from a 400mm ball to a 600mm one is not one step up. It is several more years on the farm, and the plant lands a great deal heavier: two people and a trolley.

Form is second, and it is not convertible. Ball, cone, standard, espalier and pleached panel are each started differently in the plant's first year. Once the framework is set you work with it or start again.

Stem height is third and applies only to standards. A figure such as 1.2m or 1.8m is the clear trunk under the head, set on the farm and fixed for life: the head thickens later, the stem stays put. A 1.2m stem sits at eye level beside a door. A 1.8m stem lets you walk under the canopy and plant beneath it, which is what a driveway wants.

Balls and cones

Balls suit repetition: one is an ornament, five down a path edge is architecture. Cones do the vertical work: flanking a doorway, marking the corners of a parterre, breaking a run of low hedge. Japanese Box topiary cones hold up better than English Box in warm humid gardens, while English Box carries the darker leaf of a traditional clipped garden. Both sit in the buxus range, and the buxus hedging guide covers soil, spacing and box blight.

Standards

A standard is trained or grafted on a single clear trunk with the growth held up top. It buys a defined head at a fixed height and clear ground beneath, which suits narrow beds, courtyard pots and anywhere a shrub would swallow the space at knee height. Sasanqua camellia standards flower through autumn and early winter and hold evergreen cover the rest of the year. Weeping standards differ, since the head cascades rather than sits: weeping birch on a 1.8m stem reads as a dome you stand beside, while the same graft on a 1.2m stem is a container plant. The camellia range and Japanese maple range hold those plants in their natural habit.

Espalier and pleached panels

These are the flat forms, and they screen a space too narrow for a hedge. An espalier is trained on one plane against a wall or a wire frame. Manzanillo olive espaliers take the heat and reflected glare off a north or west wall that would burn most wall shrubs. A pleached panel lifts the same idea: a clear trunk with a flat rectangle of foliage above it, so you screen a neighbour's upper window and still plant beneath. Pleached Hill's weeping fig is the workhorse in warm coastal gardens, though the roots are vigorous and belong away from pipes and paving. See the ficus range and olive range.

Clipping is the ongoing commitment

Box balls and cones want two cuts a year at a minimum, three for a hard edge: late spring once the first flush hardens, late summer, and a light tidy in early autumn in warmer districts. Do not cut box in the heat of the day or ahead of a hot dry run, because scorched cut leaves stay brown for months.

Ficus is the opposite problem. Standard or pleached, it wants clipping every six to eight weeks from spring to early autumn, then little over winter. Miss two cycles in a wet summer and the panel is no longer flat.

Flowering standards run on the flower, not the calendar. Sasanqua camellias are cut as soon as flowering finishes in late winter, so the spring flush can set next season's buds. Clip one from late spring onwards and you take those buds off before they open. Deciduous weeping standards are better tidied in dry weather in late summer or early autumn than in mid winter, because wet winter cuts invite silver leaf and bacterial canker in the ornamental prunus, and birch cut near bud burst bleeds sap. Take out anything growing into the centre, anything crossing, and anything shooting from the trunk or below the graft. Trunk shoots are urgent, not cosmetic: left alone they take over from the head.

Why a lost shape is hard to get back

Box, ficus and camellia topiary carry their foliage in a shell a few centimetres thick over bare inner wood. Two or three seasons without clipping and the shell moves outward, the interior shades out, and the outline blurs. Cut back to the old line and you are into wood with no leaves and no useful dormant buds, and most of these plants do not reshoot readily from there. Box sometimes comes back over two or three years if the roots are strong and you take it in stages, a third at a time, in spring. Camellia standards are less willing, and a bare patch in a clipped head stays bare for a long time. Ficus is the exception, since it breaks from old wood.

If nobody will hold the shears for the next five years, do not buy the shape. Buy a plant whose natural habit you like and let it do the work. The hedging range and advanced tree range hold plants that keep a decent form on one cut a year, or none.

Pot-grown topiary dries out faster than people expect

A clipped plant carries a lot of leaf area for its root volume, in a container, usually on paving against a wall throwing heat back. In a Brisbane or Perth summer a 400mm ball in full sun can want water daily. Push a finger in to the second knuckle first, because the surface tells you nothing. Water until it runs from the base, then stop. Light sprinkles keep the top wet and the root ball dry, and that is how most container topiary is lost.

Feeding matters more than in the ground, because you remove growth on purpose and then ask for more. A controlled release fertiliser rated for five to six months, applied in early spring and again in mid summer, suits box, camellia and ficus in pots, with liquid seaweed through the warm months. Feed after a cut rather than before one. Yellowing between the veins on potted box is more often waterlogging or a spent mix than a lack of fertiliser, and repotting every second or third year helps more than more pellets.

When not to buy a trained plant

Skip this group if what you want is a hedge. A run of clipped balls is not a hedge, and buying trained stock to merge into a screen throws away the training. Start with untrained plants at the right spacing.

Skip it if the site is exposed and windy: a standard is top heavy on a single stem, and a container in a coastal wind corridor goes over or gets burnt on one side and stays lopsided. Skip it if you are away for weeks over summer without irrigation on a timer: pot topiary fails fast and does not come back. Skip it in deep shade, where box, camellia standards and ficus all thin out. And skip the weeping and flowering standards if you want a productive tree: the peach and crab apple standards in the topiary and standards range are grown for form and flower.

Getting one home and settled

Trained stock arrives with a shape held tight under nursery irrigation, and the first eight weeks in your garden are where shapes get lost. Keep the water up, and do not clip for the first season beyond anything broken in transit. In the ground, dig wide rather than deep and keep the stem at the depth it sat in the pot; the notes in planting and establishing advanced trees apply here too. Decide where it goes before the truck arrives, not after.

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.