Shade-Loving Fern Borders: 8 Planting Combinations for UK Gardens

There is a strip of ground on the north side of most UK gardens that never quite dries out. The soil stays cool and crumbly into August, grass thins to nothing, and anything sold as a bedding plant gives up by July. Ferns, by contrast, settle in as though the spot had been made for them.

A shady border planted with ferns is not a compromise. Done well, it gives you unfurling croziers in spring, dense green texture through high summer, and evergreen fronds that hold the structure into winter while hellebores and snowdrops get on with the flowering. The trick is matching ferns to your particular kind of shade, then pairing them with plants that want the same conditions.

Why ferns hold a shady border together

They are the quiet workhorses of the shade garden. No staking, no deadheading, no feeding, and their roots are shallow enough to slip between tree roots where little else will grow. What they contribute is texture: the lacy fronds of lady fern against the leathery straps of hart's tongue, or the tall, near-black stems of Dryopteris wallichiana rising above low ground cover.

They also give you a choice about winter. Evergreen and semi-evergreen types such as Polystichum setiferum and Asplenium scolopendrium keep their colour through the coldest months, while deciduous species like Matteuccia struthiopteris and Osmunda regalis vanish completely and return with real drama in spring. Mix the two and the border never looks bare.

Getting the soil right before anything goes in

Almost every fern wants the same thing: soil that stays moist but drains, with plenty of rotted organic matter worked through it. Think forest floor, not bog.

1. Fork in two or three buckets of leaf mould or garden compost per square metre. On heavy clay, add coarse grit at the same time so winter rain can drain away.
2. Plant with the crown level with the soil surface, and slightly proud on clay. Ferns rot if the crown is buried.
3. Water new plants properly through their first two summers, even the damp-shade types. After that, most ferns look after themselves.
4. Mulch each autumn with leaf mould, keeping it clear of the crowns.

Deep, dry shade under conifers or a dense hedge is a different proposition, and fern choice narrows sharply. Hardy polypody (Polypodium vulgare) and broad buckler fern (Dryopteris dilatata) are the reliable options, and you should expect to water in dry spells.

Eight combinations that work in damp shade

1. Hellebores and soft shield fern

Helleborus × hybridus with Polystichum setiferum. The hellebore flowers from January into March, and the evergreen fern conceals its collapsing foliage in summer. Cut the old hellebore leaves back in late winter to reduce leaf spot; the fern stops the gap from showing.

2. Snowdrops and autumn fern

Galanthus nivalis naturalised in rough grass or beneath a deciduous shrub, with Dryopteris erythrosora. Its new fronds emerge copper-pink in spring, just as the snowdrops finish. Plant snowdrops "in the green" in spring rather than as dry bulbs in autumn; they establish far more reliably that way.

3. Blue hosta and Japanese painted fern

Hosta 'Halcyon' with Athyrium niponicum var. pictum. The fern's silver-pink fronds set off the hosta's glaucous leaves, and both want the same moist, humus-rich soil. Slugs are the only real work here: night patrols, a gravel mulch around the crowns, or nematode treatment in early summer all help, as does choosing thick-leaved hostas in the first place.

4. Hart's tongue fern and stinking hellebore

Asplenium scolopendrium with Helleborus foetidus. Both cope with drier, chalkier shade than most ferns and stay green all year. The upright strap fronds contrast well with the finely divided hellebore foliage and its clusters of green bells from December to March.

5. Shuttlecock fern and a bold hosta

Matteuccia struthiopteris with Hosta 'Sum and Substance'. This is the pairing for the wettest corner of the garden. The shuttlecock spreads by runners, so give it room or sink a root barrier. When its fronds brown in midsummer, the hosta's large leaves take over the space.

6. Wallich's wood fern and tall snowdrops

Dryopteris wallichiana with Galanthus 'S. Arnott'. The dark stems and golden-green fronds make this fern a focal point rather than background planting. Snowdrops flower at its feet in February, well before the fronds unfurl above them.

7. Royal fern and Lenten hellebores

Osmunda regalis with Helleborus × hybridus. For boggy ground beside a pond or a permanently wet patch. Royal fern is slow to establish but eventually makes a bold, almost shrub-like clump. The hellebores provide flowers while you wait.

8. Tatting fern and a small hosta

Athyrium filix-femina 'Frizelliae' with Hosta 'Blue Mouse Ears', in a narrow border or a large pot. Both stay compact, which suits a small courtyard where every centimetre counts. Keep the pot in shade and water it regularly through summer.

Planting in layers so something is always happening

The reason these pairings work is that each plant takes its turn. If you plan the border around that sequence rather than around a single season, it will earn its space all year.

• Late winter: snowdrops and hellebores in flower, evergreen fern fronds at their most valuable.
• Spring: croziers unfurl and take over as the hellebore flowers fade.
• Summer: ferns at full size, hostas providing the bold foliage.
• Autumn and winter: many ferns colour or hold their green; this is the time for tidying and mulching.

Keeping the border looking good year after year

Cut back deciduous ferns in late winter, just as the new croziers appear at the crown. Removing old fronds any earlier leaves the border looking ragged for weeks; leaving it any later risks snapping the new growth. Strip the old leaves from hellebores at the same time, and clear snowdrop foliage only once it has yellowed completely.

Divide congested clumps of Athyrium and Matteuccia

Photo: Tobi &Chris / Pexels