Using ferns to create a shady garden corner

Why a shady corner is made for ferns

Most gardens have one: the strip behind the shed, the north-facing bed beside the fence, the patch under a mature tree where little else will grow. These spots are often written off as problem areas, but they are exactly where ferns feel at home. Ferns evolved on the woodland floor, growing in the cool, damp shade cast by a canopy of leaves, and they have never lost that preference.

What makes them so useful is their texture. Where most shade-tolerant plants offer broad, solid leaves, ferns bring something airier: finely cut fronds, arching shuttlecocks and gently unfurling croziers in spring. That softness contrasts beautifully with tougher foliage and hides the bare stems of shrubs. Give them the right conditions and they will need very little from you beyond moisture and a decent mulch.

Picking ferns that will thrive in your soil

Not all ferns want the same thing, so it is worth matching the plant to your ground before you buy. As a rule, they prefer soil that stays reliably moist but never waterlogged, rich in leaf litter and on the acid side of neutral.

• Male fern (Dryopteris filix-mas) — a tough British native that shrugs off dry shade once established. Upright and unfussy.
• Soft shield fern (Polystichum setiferum) — evergreen, with finely divided, softly hairy fronds. Excellent for winter structure.
• Hart's tongue fern (Asplenium scolopendrium) — strap-like, glossy green leaves. Tolerates lime and drier conditions, and looks superb against stone.
• Japanese painted fern (Athyrium niponicum var. pictum) — silver and burgundy fronds that lift a dark corner. Wants consistent moisture.
• Golden male fern (Dryopteris affinis) — semi-evergreen, with golden-scaled croziers in spring and a strong constitution.
• Shuttlecock fern (Matteuccia struthiopteris) — tall, upright and dramatic, but only where the ground stays damp.

For a corner roughly a metre square, three to five ferns is usually plenty. Plant in groups rather than dotting them about, and repeat the same variety for a calmer look.

Preparing the ground before you plant

Ferns reward a little preparation. They dislike sitting in dry, dusty soil, but they also rot in stagnant, waterlogged ground, so the aim is moisture-retentive yet free-draining.

• Fork over the area to a spade's depth and remove perennial weeds, especially bindweed and ground elder roots.
• Dig in two bucketfuls of leafmould or garden compost per square metre. On heavy clay, add a handful of horticultural grit at the same time.
• Plant at the same depth the fern was growing in its pot, firm gently and water well.
• Mulch with 5–7cm (2–3in) of leafmould, keeping it clear of the crowns.

Spring and early autumn are the best planting times, while the soil is warm and damp. If your corner is very dry, sink a soaker hose before mulching, and check the soil below the surface rather than guessing from the top.

Pairing ferns with hostas and moss

Hostas are the natural partner. Their bold, ribbed leaves pick up the light in a dim corner and set off the lacework of fern fronds perfectly. Choose thick-leaved varieties, which tend to resist slugs better than thin, pale ones, and keep them well watered in their first season.

Slugs are the main frustration, so plan ahead: set hostas in pots with copper tape around the rim, or surround them with a gritty barrier and a nightly patrol after rain. Nematode treatments in late spring work well in damp soil and are kind to the rest of the wildlife.

Moss is the finishing touch. It will colonise damp, bare soil and shaded stone on its own if you give it a chance, so avoid hoeing and weedkiller in the corner and keep the surface damp during dry spells. A little moss on logs, boulders and between paving stones knits the planting together and makes the whole area look as though it has always been there.

Adding structure and year-round interest

A fern corner can look formless without a few solid anchors, so include a log, a group of stones or a small trickle of water. These give the eye something to rest on and create the damp, humid microclimate ferns love.

Think about the winter months too. Evergreen ferns such as soft shield fern and hart's tongue hold their shape when everything else collapses, and they look good beside hellebores, snowdrops and cyclamen. Deciduous ferns disappear entirely, so plant them among evergreens rather than in a bed of their own.

Looking after the corner through the year

• Watering: keep the soil evenly moist for the first year and during dry spells, especially in pots.
• Feeding: a mulch of leafmould each spring is usually enough. Container ferns benefit from a dilute liquid feed in summer.
• Tidying: cut deciduous ferns back to the crown in late winter, before the new croziers push through. Remove dead or damaged fronds from evergreens as you see them.
• Dividing: lift and split congested clumps in early spring, replanting the outer pieces.
• Pests: watch for slugs on new growth and vine weevil in pots, and deal with them early.

Get the moisture right and this will be the calmest, most effortless part of the garden — a green, quiet corner that asks for almost nothing and gives back all year.