Why Native Berries Work So Hard for Birds

By late October, most garden plants have packed up for the year. Native berry shrubs are just getting going. Their fruit is high in sugar and fat at exactly the moment when insects are scarce and birds need to lay down reserves for cold nights and long migrations. A single hawthorn can hold thousands of haws, and those berries will feed blackbirds, song thrushes and redwings for weeks.

The benefit runs well beyond autumn, though. Native shrubs are larval food plants for a huge range of moths and other insects, and those caterpillars are what blue tits and robins stuff into nestlings in May and June. Plant a berry shrub and you are feeding birds in two seasons, not one. Berries also ripen in sequence, so a mixed planting effectively stretches the larder from late summer right through to February.

Hawthorn: The Backbone of a Wildlife Hedge

Hawthorn (Crataegus monogyna) is the single best-value shrub you can plant for garden birds. Its dense, thorny growth makes a nest site that cats and magpies cannot easily penetrate, and its red haws — each with a single stone — are taken by redwings, fieldfares, blackbirds, song thrushes and even the occasional waxwing.

Haws ripen from September and often hang on into January, which makes hawthorn the dependable midwinter crop. It is unfussy about soil, coping with clay, chalk, wind and exposed sites, and it will grow as a clipped hedge at 1.5 metres or as a small tree of six to eight metres if left alone. Bare-root whips planted at 45–60cm spacing in a double staggered row make a thick hedge within three or four years. Trim lightly in late winter rather than autumn: haws form on the current year's growth, so a September haircut removes your entire crop.

Rowan: Early Berries for Waxwings and Thrushes

Rowan or mountain ash (Sorbus aucuparia) is the shrub to plant if you want the spectacle of a flock stripping a tree in an afternoon. Its orange-red berries ripen from late August, earlier than almost anything else, and waxwings, mistle thrushes, redwings and fieldfares will descend on a laden tree in numbers.

Rowan suits small gardens well. The crown is narrow and upright, the growth is modest, and it tolerates wind, frost and poor, thin soils. It prefers acid to neutral ground and dislikes sitting wet, so improve heavy clay with grit and compost before planting. Trees crop more heavily in full sun, though light shade is tolerated. Because rowan fruit disappears early — often by November — plant it alongside hawthorn so the birds have something to move on to. Its ferny leaves turn butter-yellow in October, which is a fine reward in itself.

Guelder Rose: The Late Larder

Guelder rose (Viburnum opulus) is the most underrated of the three. It is a native hedgerow and damp woodland shrub, so it thrives where the ground stays moist — the boggy corner, the downpipe run-off, the heavy clay at the bottom of the garden. Lacecap heads of creamy white flowers open in June, and by autumn the translucent scarlet berries hang in heavy, drooping clusters that last well into the new year when little else remains.

Bullfinches, mistle thrushes and blackcaps take the fruit. Guelder rose is not thorny, so it is not a nesting shrub in the way hawthorn is, but its dense twiggy framework gives excellent cover and its leaves colour to deep crimson and purple before falling. Prune after fruiting in late winter, cutting out about a fifth of the oldest stems at the base to keep it vigorous and free-cropping.

Planting and Aftercare

• Plant bare-root stock between November and March, when the ground is workable and not frozen.
• Space hedge plants 45–60cm apart in a double staggered row; allow 2.5–3 metres between specimen trees and shrubs.
• Clear a weed-free strip at least 60cm wide around each plant. Grass competition is the main reason young shrubs sulk.
• Mulch with well-rotted compost or leafmould, but keep it clear of the stems to avoid rotting the bark.
• Water thoroughly for the first two summers. After that, these three are largely self-sufficient.
• Go easy on nitrogen-rich feed — it produces soft leafy growth at the expense of flowers and fruit.
• Leave the autumn tidy-up until late winter, and let fallen berries lie. Thrushes and blackbirds happily feed on the ground.

A Berry Calendar and Small-Space Options

Rowan gives you late August to November; hawthorn from September into January; guelder rose from October through to February. Overlap them and something is always in fruit.

If space is tight, a single rowan in a lawn or border will earn its keep, and a three-metre run of hawthorn hedge along a boundary does more for birds than a whole border of ornamentals. Rowan also grows well in a large pot for a number of years, provided you water it in dry spells. Add a shallow dish of water nearby, keep a patch of long grass for insects, and resist the urge to net anything. Within two or three winters you should hear the thrushes before you see them.