25 shade perennials for cold-climate gardens, with height and zone

Shade perennials at a glance

Contents

• Shade perennials at a glance
• Dry shade, moist shade and deep shade
• How many hours of sun is shade?
• All 25 shade perennials in one table
• Nine perennials for dry shade under trees
• Nine perennials for moist shade on a north side
• Seven perennials for deep shade against a wall
• Why is dry shade under trees so hard?
• How to plant in root-filled dry shade
• Leaf shape and colour – a shade bed without flowers
• Which shade perennials actually flower?
• The shade bed month by month
• Zone and timing table for USDA zones 3–6
• Which shade perennials survive slugs?
• A planting plan for 10 m² (100 sq ft)
• Common mistakes
• Frequently asked questions

Dry shade, moist shade and deep shade

Most plant lists stop at the word "shade". Light decides what a plant can photosynthesise, but soil moisture and root competition decide whether it lives – and the two do not travel together.

Dry shade under trees. The canopy takes the light and most of the rain, and feeder roots keep the top layer dry into September. You need thick rhizomes, leathery leaves or deep roots: bigroot geranium, barrenwort, male fern, bergenia. Slow, but hard to kill once rooted.

Moist shade on a north side. Behind the house, north of a fence, at the foot of a slope. Cool indirect light, soil that holds water all summer. The happiest shade there is, and the home of big foliage: hosta, astilbe, ostrich fern.

Deep shade against a wall. A courtyard corner, under a deck, behind a garage. Under two hours of sun, often none, and rain arrives at an angle. What works is evergreen ground cover and tough ferns: pachysandra, Lenten rose, Christmas fern.

Oddly, dry shade is the site people keep trying to plant while the damp north side sits empty. Reverse that and you get more garden for the money. For the opposite problem, see perennials for full sun.

How many hours of sun is shade?

Measure before you buy. The RHS counts hours at midsummer: full sun more than six, partial shade three to six, moderate shade two to three, deep shade under two. University of Minnesota Extension puts the line between part shade and full shade at three hours.

Go outside four times on a clear day in late June – eight, eleven, two and five – and mark each slot sun, dappled or shade. Four shade marks means deep shade; two and two means part shade, where nearly this whole list works.

Check moisture the same day. Dig 30 cm (12 in) down. Dry grey-brown soil full of fine pale roots means dry shade; dark soil that clumps in your hand means moist shade. That decides which list you shop from.

Look up as well. A high canopy you can see sky through gives dappled light, which supports far more species than the hour count suggests. Beech, horse chestnut, sycamore maple and spruce cast the densest shade; birch, oak and ash let more through.

All 25 shade perennials in one table

Heights are mature size including flower stems, zones are USDA ranges from the sources at the end. The moisture column is the one most perennial lists leave out, and the one that decides whether a plant survives its second summer.

Nine perennials for dry shade under trees

The list for the strip under the maple, the birch or the old hedge. What they share: roots that store water, and tolerance of dry August soil.

Bigroot geranium

Plant this one first. 30–45 cm (12–18 in), magenta or pink in late spring, zone 4, spaced 45 cm (18 in). Lobed leaves, aromatic when brushed, red in autumn. After three years it covers the ground and suppresses weeds.

Barrenwort

Epimedium × versicolor 'Sulphureum': 15–30 cm (6–12 in), sulphur-yellow flowers on wiry stems in mid to late spring, zone 5, spaced 40 cm (16 in). Drought tolerant once established. Shear last year's leaves in early spring or they hide the flowers.

Pennsylvania sedge

A native sedge, 15–20 cm (6–8 in), flowering April to May, zone 3, spaced 30 cm (12 in). It takes full sun to deep shade and dry soil to wet, which almost nothing else does, and is the best lawn substitute for shade with no foot traffic.

White wood aster

The species that fixes the shade bed's biggest gap: nothing in bloom after August. 30–90 cm (1–3 ft), white from August to October, zone 3, spaced 45 cm (18 in). Shade, deer and drought tolerant at once. Shear to 15 cm (6 in) in early summer for a denser plant.

Lady's mantle

30–45 cm (12–18 in), chartreuse sprays from late spring into summer, zone 3, spaced 45 cm (18 in). The pleated grey-green leaves hold rain in beads. It self-seeds hard, so cut it back straight after flowering.

Male fern

The tough big fern for dry shade: 60–90 cm (2–3 ft), zone 4, spaced 60 cm (24 in). Stiff dark fronds turning coppery in autumn. It holds an RHS Award of Garden Merit and tolerates deep shade, deer, rabbits and clay.

Christmas fern

Evergreen, 30–90 cm (1–3 ft), zone 3, spaced 60 cm (24 in). This native fern takes dry to medium soil and is listed as drought tolerant, rare in a fern. Its one demand is drainage – crown rot follows soggy winter ground.

Spotted deadnettle

8–23 cm (3–9 in), silver-blotched leaves and pink, purple or white flowers from spring into summer. Zone 3, spaced 45 cm (18 in). 'Beacon Silver' and 'White Nancy' light a dark corner on foliage alone. It takes dry soil but not compacted or wet ground.

Barren strawberry

Geum fragarioides, still sold as Waldsteinia, makes an 8–15 cm (3–6 in) evergreen mat with yellow flowers March to May. Zone 3, spaced 45 cm (18 in). It spreads by stolons – a floor that looks after itself.

Nine perennials for moist shade on a north side

Different rules here. The soil holds water and organic matter is high, so you can grow the big leaves that make a shade garden dramatic.

Hosta

The backbone of the shade garden: zone 3, from 10 cm (4 in) dwarfs to plants 75 cm (2.5 ft) tall and 90 cm (3 ft) across, flowering in summer. It wants moisture but rejects soggy winter soil, and needs two months below 4 °C (40 °F) to break dormancy.

Astilbe

Feathery plumes in white, pink or red from late spring into summer, 45–135 cm (1.5–4.5 ft) by cultivar, zone 3, spaced 45 cm (18 in). It brings colour when the shade bed is flattest, and tolerates no drought – leaf edges brown within days.

Ostrich fern

90–150 cm (3–5 ft) of pale green fronds in a clean vase shape, zone 3, spaced 90 cm (36 in). It wants constant moisture, handles clay, and runs hard on underground stolons – in a small bed, sink a root barrier.

Lady fern

60–90 cm (2–3 ft) of finely cut light green fronds in loose clumps, zone 3, spaced 60 cm (24 in). Softer and airier than male fern, and it will not take drought. Cut to the ground in spring.

Japanese painted fern

45–60 cm (1.5–2 ft), fronds in silver-grey and burgundy with a metallic sheen, zone 4, spaced 45 cm (18 in). It needs moist rich soil and light shade: sun bleaches the colour, darkness turns it plain green.

Siberian bugloss

30–45 cm (1–1.5 ft), true blue forget-me-not flowers in early spring over big heart-shaped leaves. Zone 3, spaced 45 cm (18 in). Silver-leaved cultivars such as 'Jack Frost' glow in a dark corner all season. Intolerant of dry soil and humid heat.

Lungwort

25–30 cm (10–12 in), flowering in early spring in blue, pink or white, often two colours on one plant. Zone 3, spaced 45 cm (18 in). The white-spotted leaves are a light source in themselves, and the flowers feed emerging bumblebees.

Bleeding heart

Arching stems 60–90 cm (2–3 ft) hung with pink hearts from April to June, zone 2, spaced 60–90 cm (24–36 in). Expect it to yellow and vanish by August – normal, not disease. Plant a hosta or fern alongside to fill the gap.

Goat's beard

A native shrub-sized perennial, 90–180 cm (3–6 ft) tall and 120 cm (4 ft) wide, with creamy plumes in May and June. Zone 3, spaced 90 cm (36 in). It wants moist fertile soil and takes two or three seasons to fill out.

Seven perennials for deep shade against a wall

Under two hours of direct sun, often none. The choice narrows sharply, but seven species do the job and several are evergreen – which matters in a corner otherwise bare half the year.

Bergenia

30–45 cm (1–1.5 ft), large leathery evergreen leaves and pink panicles in spring, zone 3, spaced 45 cm (18 in). It takes almost any light and any soil, colours red in winter, and is the calmest leaf shape you can set beside a fern.

Wild ginger

Asarum canadense makes a 15–30 cm (6–12 in) carpet of matte heart-shaped leaves with maroon flowers hidden underneath in April. Zone 4, spaced 30 cm (12 in). It handles deep shade but has poor drought tolerance. Slow, then permanent.

Solomon's seal

Arching stems 90–180 cm (3–6 ft) with paired leaves and hanging creamy bells in spring, zone 3, spaced 60 cm (24 in). Foliage turns gold in autumn, and mildly toxic blue-black berries follow. Few shade plants have this much architecture.

Lenten rose

30–60 cm (1–2 ft), cupped flowers in white, pink, purple, green or near-black in late winter, zone 4, spaced 45 cm (18 in). Evergreen, deer resistant and fairly drought tolerant once settled. Cut old leaves off in late winter so the flowers show.

Japanese spurge

15–30 cm (6–12 in) of glossy toothed evergreen leaves in whorls, with small fragrant white flowers in early spring. Zone 4, spaced 30 cm (12 in). It wants acidic soil and shade – foliage bleaches in sun. Three years to close, then hard to remove.

Foamflower

20–30 cm (9–12 in), spikes of white starry flowers in May over lobed leaves that often colour in autumn. Zone 4, spaced 45 cm (18 in). It takes part to full shade, acidic soil and medium moisture, and edges a shaded path well.

Sweet woodruff

15–30 cm (6–12 in), whorled leaves and small white star flowers in spring, zone 4, spaced 30 cm (12 in). It smells of new-mown hay as it dries, runs by rhizome, and is flagged as potentially weedy – use it under trees, not in a mixed bed.

Why is dry shade under trees so hard?

It is not about light. It is that you are planting into a root system that already owns the ground.

University of Minnesota Extension notes that the feeder roots of trees and shrubs occupy the top 45–50 cm (18–20 in) of soil, exactly the layer you want for perennials. A mature tree empties that volume every warm week, and a new perennial with a 10 cm (4 in) root ball has no chance.

Add rain shadow. A dense canopy intercepts much of the summer rainfall, and what runs off travels down the trunk or falls at the drip line. The ground nearest the trunk is the driest spot in the garden, even in a wet summer.

Species matters. Norway maple and birch are shallow-rooted and ruthless competitors for water. Under an old spruce the ground is dark, dry and acidified by needle litter, and the honest answer is wood chips, not plants.

Then the mistake that does most damage: the obvious fix. Spreading 20 cm (8 in) of topsoil over the roots feels reasonable but suffocates feeder roots, which need oxygen. The RHS advice is to work well-rotted organic matter into the existing soil, plant in autumn so plants establish before leaf-out, then mulch each spring and water in dry spells through the first growing season. The south-west side of a tree also offers better odds than the north-east.

How to plant in root-filled dry shade

For the hardest case: dry soil, dense root mat, a tree that must not be damaged.

1. Plant in pockets, not a bed. Five to eight pockets per square metre (per 10 sq ft) in the gaps between major roots.
2. Never cut a root thicker than your thumb. Fine roots you may sever; large ones you plant around.
3. Water the site the day before, 10–15 litres per square metre (2.5 gallons per 10 sq ft). A dry root mat wicks the plant dry.
4. Buy small plants. A 9 cm (3.5 in) pot establishes better in rooty ground than a 3 litre (1 gallon) one.
5. Soak the root ball in a bucket until the bubbles stop.
6. Dig twice as wide as the root ball, no deeper. Width gives new roots a run; depth lets the plant sink.
7. Mix the excavated soil with compost, half and half. Pure potting soil behaves like a buried pot and dries faster than the ground around it.
8. Set the plant at the depth it grew in the pot and firm the soil so no air pockets remain.
9. Water in with 5 litres (1 gallon) per plant and let it drain before mulching.
10. Mulch with 5 cm (2 in) of shredded leaves, keeping it off each crown.
11. Water weekly through the first season in dry spells – 25 mm (1 in) in one soak, not a daily sprinkle. In year two, only after three dry weeks.
12. Top-dress with 2 cm (1 in) of compost every spring for three years. That is how you build organic matter where the tree takes everything else.

Leaf shape and colour – a shade bed without flowers

A shade bed of green leaves in the same shape reads as clutter, however good each plant is. The fix is contrast in form: a large round mass against a finely cut one, glossy against matte, plus a linear shape for movement.

Simple rule: three large leaf forms per 10 m², everything else mid-size and matte. More and they compete instead of contrasting.

Which shade perennials actually flower?

Most do, but not when you expect. The shade garden peaks in May. Under deciduous trees, spring is the only stretch when the ground gets full light, and the species that evolved there spend their whole flowering budget before the canopy closes.

That creates a problem and a solution. The problem: a bed bought on flower photos is spectacular in May and green for five months. The solution: pick three species for late bloom.

Late winter to April: Lenten rose, lungwort, barren strawberry, Japanese spurge.

May and June: Siberian bugloss, bleeding heart, foamflower, sweet woodruff, Solomon's seal, wild ginger, barrenwort, bergenia, goat's beard.

July to October: hosta, astilbe, lady's mantle and white wood aster. Those four carry the bed from midsummer to frost, and only white wood aster does it in dry shade.

For anything longer the answer is bulbs: winter aconite, snowdrops and Virginia bluebells finish before the trees leaf out. For brighter spots, see long-flowering perennials.

The shade bed month by month

The working year in shade looks nothing like the one in sun. Most of it falls in March and April.

Zone and timing table for USDA zones 3–6

The table turns the zone into dates for the moments where timing decides the outcome, and flags which of the 25 turn marginal going north.

One difference from sunny sites: in shade, autumn planting is often better, because the ground stays cooler and evenly moist. The RHS specifically recommends it under trees. That works in zones 5 and 6; in zone 3 and exposed zone 4, spring is safer.

Which shade perennials survive slugs?

Shade and moisture are what slugs want, and hosta sits at the top of the menu. Not a reason to give up hostas, only to choose cultivars deliberately.

Rarely touched: all the ferns, bergenia, bigroot geranium, pachysandra, Pennsylvania sedge, Solomon's seal, wild ginger, hellebore and barrenwort. Leathery or aromatic foliage is not worth their effort.

Moderately affected: astilbe, lungwort, Siberian bugloss, deadnettle and lady's mantle. They get chewed and grow through it.

Badly affected: hosta and bleeding heart. For hosta the rule is simple: the thicker and waxier the leaf, the less damage. Blue Hosta sieboldiana types such as 'Elegans' are often left alone, while thin variegated cultivars go first.

In practice: patrol on damp evenings in May and June, before numbers build. Keep mulch off the hosta crowns and leave no boards or flat stones in the bed.

One more caution on ground cover. Periwinkle, Vinca minor, is the most shade-tolerant carpet there is, but the NC Invasive Plant Council lists it as invasive, and Japanese spurge, sweet woodruff and ostrich fern run hard too. Use them inside a courtyard or a mown edge, not on a boundary backing onto woodland. Pennsylvania sedge, wild ginger and foamflower do the same with less reach.

A planting plan for 10 m² (100 sq ft)

A plan for the commonest space: a strip 2 × 5 m (6 × 16 ft) in part to full shade, average to moist soil, 42 plants.

• Back: 3 ostrich fern and 2 Solomon's seal, a 90–150 cm backdrop.
• Mid layer, mass: 5 large hostas and 3 bergenia, the anchors all season.
• Mid layer, air: 4 lady fern and 3 astilbe – fine-cut against the hosta's round, plus July colour.
• Highlights: 3 Siberian bugloss and 3 lungwort where the corner is darkest.
• Late bloom: 3 white wood aster at the driest end, or the bed is green from August.
• Floor: 9 wild ginger and 4 foamflower in front of the larger plants.
• Bulbs: 100 snowdrops and 50 winter aconite between the perennials in September.

Plant in groups of three or five, never singly: in shade the eye reads form and mass rather than colour, so a lone plant disappears. The bed closes in year three.

Where the ground is so rooty the spade bounces, build beside the tree instead of under it: a raised bed outside the drip line gives planting depth without smothering roots.

Common mistakes

• Choosing for light but not moisture. Hosta and bigroot geranium both say "shade" on the label and can never swap places.
• Spreading topsoil over tree roots. 20 cm (8 in) of new soil suffocates feeder roots. Work compost into what is there.
• Cutting large tree roots. Anything thicker than a thumb is structural. Move the pocket, not the root.
• Stopping the watering too soon. Drought tolerance arrives in year two, sometimes three.
• Mulching with gravel. Gravel belongs on hot dry sites. In shade you want leaves and leaf mould, which build organic matter and hold water.
• Bagging the autumn leaves. They are the shade bed's fertiliser, mulch and winter cover in one. Rake them in.
• Planting too thinly. Shade plants grow slowly. Space tighter than feels right and expect three years to full cover.
• Shopping only in May. You get a bed that flowers in May and stays green until October. Buy three species that bloom after July.

Frequently asked questions

What perennials grow best in full shade?
Hosta, bergenia, wild ginger, Solomon's seal, hellebore, pachysandra, foamflower and all the ferns. Under three hours of sun, flowering is sparse and foliage carries the planting, so choose for leaf shape and evergreen value rather than bloom. Four of those stay green all winter.

What can I plant under a tree where nothing grows?
Bigroot geranium, barrenwort, Pennsylvania sedge, male fern, Christmas fern, bergenia, deadnettle and white wood aster all handle root competition and drought. Method matters as much as species: plant in pockets between large roots, mix compost into the existing soil rather than adding topsoil, and water weekly.

Do any shade perennials bloom all summer?
Not many. Lady's mantle flowers late spring into summer, hosta and astilbe carry July and August, and white wood aster runs August to October. Those four stop a shade bed going uniformly green after May. Everything else flowers early, before the canopy closes.

How many hours of sun is full shade?
Less than three hours of direct sun a day, and deep shade is under two. Part shade is three to six. Dappled light under a high open canopy counts as more usable light than the hour figure suggests, so a spot with no direct sun but plenty of sky grows far more than a dark wall corner.

Which shade perennials are evergreen in cold zones?
Bergenia, pachysandra, Christmas fern, hellebore, barren strawberry and periwinkle, with barrenwort holding its leaves in milder winters. Put at least one evergreen in every shade planting, otherwise the area is bare soil from November to April – the months you see it most from indoors.

Will hostas grow in dry shade?
Not without irrigation. Hostas want moisture-retentive soil high in organic matter. In dry shade under a tree the leaves stay small, edges brown and the plant sits still for years. For large foliage on a dry site, male fern or bergenia gives the same effect without the watering.

When should you plant perennials in shade?
Late April to mid-June is the main window. In zones 5 and 6, late August into September works just as well, and under trees autumn is often better, because roots establish before leaf-out takes the water. In zone 3, plant in spring.

How do you keep slugs off hostas?
Choose thick blue-leaved Hosta sieboldiana types such as 'Elegans' over thin variegated cultivars, and patrol on damp evenings in May and June before numbers build. Keep mulch back from the crowns and remove boards or flat stones that give daytime shelter.

Want more plant lists in your inbox – sign up for the GardenLovers newsletter and get the shade calendar before spring.