A border edging in full sun is the strip that gets looked at most and forgiven least. The soil dries fast, the light is unrelenting from midday onwards, and by September most summer bedding has gone leggy and tired just as the rest of the garden starts to turn. A good autumn scheme here keeps a low, tidy outline, leans on plants that flower hardest in the cooler, brighter weeks, and holds structure once the flowers finally stop.
From back to front: Hebe, Ornamental tobacco, Marigold, Erigeron, French marigold, Ornamental cabbage, Gazania.
Place Hebe along the back of the edging as the one evergreen in the scheme. The dense, neatly layered foliage gives the strip a defined back edge all year, and the late bottlebrush spikes carry colour well into autumn. Because it holds its shape without staking, it stops the softer, floppier planting in front from spilling backwards into the lawn or path behind.
Ornamental tobacco gives the scheme its height and its evening scent, flowering steadily from midsummer right up to the first hard frost. The loose, upright stems and open trumpets break up the solidity of the shrubby back row with something airier. Keep it directly in front of the evergreen so the pale flowers read against dark foliage, which is when they look best at dusk.
The taller forms of Marigold sit in the middle of the strip, where their heavy, rounded heads give autumn its orange and deep yellow. They flower hardest once nights cool, so they peak exactly when the scheme needs them to. Their bushy, upright habit also props up the looser stems either side, and the strong scent of the foliage earns its place in a border that is brushed past daily.
Erigeron is the softening element, throwing out small daisies on wiry stems from early summer until the frosts arrive. The fine texture and pale, washed colouring calm down the hot shades behind it, which otherwise risk looking blocky. It tumbles gently forwards over the edge of a path or kerb without smothering the shorter plants beside it.
French marigold takes the front-middle rank, lower and tighter than its taller relative, with mahogany-and-gold flowers that keep coming as long as you deadhead. It repeats the autumn colour at knee height, which is what makes an edging read as deliberate rather than accidental. Plant it in a continuous run so the colour links across the whole strip rather than sitting in isolated clumps.
Ornamental cabbage is the plant that takes over as everything else fades. Its rosettes colour up properly only once the cold sets in, turning cream, pink or purple just as the last flowers drop. Slot it in as gaps appear at the front, and it will carry the edging through late autumn and into winter with pure foliage.
Gazania belongs on the very front lip of the border, where it gets the most heat and the sharpest drainage. The flat, silky daisies open wide on bright autumn days and sit close to the ground, giving the scheme a clean finished edge. Its grey-backed leaves also pick up the tones in the foliage behind it, tying the hot colours to the cooler ones.
Work with a strip around 1 m deep and set the planting in four ranks. Space Hebe 60 cm apart along the back, with Ornamental tobacco 40 cm apart just in front of it in a staggered line. Put Marigold through the middle at 35 cm, broken by drifts of Erigeron in groups of three at 30 cm, so the texture alternates rather than running as two stripes. The front two ranks go in tighter: French marigold at 25 cm, Ornamental cabbage dropped in at 30 cm wherever there is a gap by early autumn, and Gazania at 25 cm along the outermost edge. Plant in odd-numbered groups of three or five of each, never singly, or the edging looks spotty from a distance.
In spring the strip is mostly evergreen shape and fresh foliage, with the shrubby back row doing the work while the rest fills out. Summer brings the first flush from the daisies and the bedding, and scent in the evenings. Autumn is the peak: hot oranges and golds through the middle, pale daisies weaving between them, and open faces along the front edge on sunny days. Once frost ends the flowering, the rosettes at the front and the clipped back row keep the line crisp through winter, so the border still looks intentional with nothing in bloom at all.
