Ornamental · Aristolochiaceae
Wild Ginger
Asarum canadense
A native shade groundcover that rewards you with a spreading green carpet built for shade and moisture.
Full shade
Every 3–7 days
USDA 4–6
6–12 in · 15–30 cm
Overview
Wild ginger is a real winner for a shady, damp corner, a low native of eastern woodlands that spreads a lush carpet of hairy, heart-shaped leaves across the forest floor. Yes, the rhizome smells faintly of ginger and that is where the name comes from, but this one lives in the birthwort family and shares no roots with the ginger on your spice shelf. It hugs the ground and tops out at just 6 to 12 inches (15 to 30 cm), so it slots neatly under taller plants.
Spring brings a fun little treasure hunt. Down at soil level the plant opens odd brownish-purple, bell-shaped flowers, tucked under the leaves so you have to part the foliage to find them. Then the ants take over, hauling the seeds off to launch fresh patches. Set one planting in good ground and it knits itself into a broad, spreading colony year on year.
This plant truly shines as a shade groundcover, filling the damp, rich, dappled spot where lawn and fussier flowers throw in the towel. Hand it that tricky corner and it just keeps colonizing, season after season. One rule stands firmly apart from all the growing fun: for all the old habit of drying the root for flavoring, no part of wild ginger is safe to eat.
Care
The short version: hand it full to part shade, rich humusy soil, and steady moisture all season, and skip the drought, which is the one thing this plant simply will not put up with.
Light
Wild ginger comes alive in full to part shade, the dappled light that pools under a tree canopy. Give it a touch of morning or partial sun where the soil stays moist and it copes just fine, but blast it with strong sun and it dries out fast, leaving the leaves the worse for it.
Water
Keep that soil constantly moist, because drought is where this plant taps out. Water it through dry spells so the ground never bakes, roughly every 3 to 7 days depending on heat and shade. It even takes the odd wet patch in stride.
Soil
Set it in rich, humusy ground that grips moisture yet still drains, the loose, leaf-fed stuff of a woodland floor. It flexes across an acidic-to-neutral range too, thriving anywhere from a pH of 4.5 to 7.0.
Temperature
This is one tough customer, powering through winters down to about -29°F (-34°C) and summers up to 84°F (29°C). The deciduous leaves bow out in fall and come charging back each spring.
Humidity
No humidity number to chase here, since ordinary outdoor air does the job. What really drives it is steady moisture at the roots and the cool, sheltered air of a shaded bed.
Feeding
Feeding is barely on the to-do list in decent woodland soil. A single spring top-dress of leaf mold or compost is all it wants, feeding the ground slowly and mimicking the leaf litter it grows in out in the wild.
Pruning
Pruning hardly registers here. Snap off any tattered or damaged leaves when they bug you, and let the rest die back on its own through fall, since the foliage is deciduous.
Repotting
Wild ginger runs as an in-ground groundcover, not a potted plant, so repotting drops right off the list. Every few years, though, dig in and lift and divide a colony that crowds itself or thins out in the middle.
Size & spacing
These stay low and tidy at 6 to 12 inches (15 to 30 cm) tall, with each plant fanning out 6 to 18 inches (15 to 45 cm) wide. Space them for that spread and watch them knit into a continuous mat over time.
When to plant
Timing is refreshingly relaxed. Get divisions in the ground in spring or fall while the soil runs cool and damp, count on it powering through zones 4 to 6, and go hunting for those hidden flowers at ground level in early to mid spring.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Spring or fall
- Harvest: Brownish-purple bell-shaped flowers in early to mid spring (April-May), hidden at ground level beneath the foliage.
Hardiness
USDA hardiness zones: 4–6
Temperature: down to -34°C
Troubleshooting
Growing wild ginger is a genuinely low-drama affair. When trouble does show up, it almost always points to slugs loving the damp shade or soil that dried out, and both are quick to read and quick to fix.
The patch wilting, yellowing, and going downhill
Because wild ginger runs on poor drought tolerance, dry soil is the first thing to rule out. Starved of water, it flags and browns along the leaf edges, and it always struggles worst in the sunnier, drier corners of a bed. Soak it deeply to bring the moisture back, pile on leaf-mold mulch to lock it in, and shift the whole planting to a shadier, damper spot if the trouble keeps circling back.
Fix:
- Water deeply to restore even soil moisture
- Mulch with leaf mold or compost to retain moisture
- Relocate to a shadier, moister site if needed
Ragged holes punched through the leaves
That damage is pure slugs and snails, which feast hardest in damp shade and right after rain. Hunt for slime trails and flip the leaves at night, where they hole up. Pick them off by hand in the evening, sweep away the leaf litter that shelters them, and scatter iron-phosphate bait if the chewing really takes off.
Fix:
- Hand-pick slugs and snails in the evening
- Remove leaf litter and debris that shelter them
- Use iron-phosphate slug bait if damage is heavy
A rash or itch after handling the leaves bare-handed
Handle the foliage bare-handed and some people pick up contact dermatitis, with redness or itching where the skin brushed it. Happily, it clears the moment the exposure stops. Wash the spot with soap and water, then grab gloves before you handle or divide the plant next time.
Fix:
- Wash the affected skin with soap and water
- Wear gloves when handling or dividing the plant
Toxicity
Here is where the fun stops and the rule takes over: keep this plant off the menu for everyone. Every part packs aristolochic acid, a compound that damages the kidneys and ranks as a known carcinogen, so forget the old trick of seasoning with the root. Keep it clear of people, pets, and grazing animals, and pull on gloves before you handle the leaves, which can irritate skin.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Caution
A cat that chews the leaves or roots can drool and land an upset stomach. The bigger red flag is the aristolochic acid every part carries, which hammers the kidneys, so keep curious cats well clear of it.
Dogs Caution
A dog that chews it usually ends up with an irritated mouth and a queasy stomach. Since the plant packs aristolochic acid, a known kidney toxin, treat any real mouthful as a cue to call the vet.
Horses Caution
Horses rarely go for it in the shade where it grows, but the aristolochic acid loaded in its foliage and roots hits the kidneys hard. Keep it out of pasture and hay for good measure.
Rabbits Caution
This is no green to hand a rabbit. The aristolochic acid running through every part is a straight-up kidney poison, so even a small nibble is worth heading off.
Livestock Caution
Cattle, goats, and sheep pull in the same kidney-damaging aristolochic acid if they browse it. Fence it off from grazing animals and keep it clear of cut forage.
Birds Caution
Poultry and other birds should stay off the leaves and rhizomes, which carry the carcinogenic, kidney-toxic aristolochic acid. There is no safe part here for them to eat.
People Caution
For all the old habit of using it as a seasoning, no part of wild ginger is safe to eat. The aristolochic acid inside wrecks the kidneys and ranks as a known human carcinogen, and handling the leaves can irritate skin too.
Wear gloves when handling, dividing, or pruning to avoid skin irritation, and keep the plant and its roots from being eaten by people or pets.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
Varieties
Good news for the keen grower, wild ginger is grown as the straight species, so there is just one plant to master here.
Asarum canadense (species)
This is the native deciduous species you will grow, easy to pick out by its hairy, heart-shaped leaves and a brownish-purple, three-lobed bell flower that sits hidden right at ground level.
Companions
Wild ginger pairs naturally with the other plants of the shaded woodland floor, the trilliums, violets, and ferns that want the same damp, rich, dappled ground.
Plant near
Trillium grandiflorum: Shares the same moist, shady woodland niche and naturalizes well alongside wild ginger as a groundcover.
Viola pubescens: A native woodland companion that thrives in the same part-to-full shade and rich soil conditions.
Ferns and woodland wildflowers: Combine well in shade and woodland gardens where wild ginger forms a low groundcover layer.
How to propagate
Multiplying wild ginger is a rewarding job once it settles in, made even easier because the plant charges ahead and spreads itself through creeping rhizomes.
DivisionEasy
Spring or fall · One to two growing seasons
Division is the fastest, surest way to crank out more wild ginger. Dig up an established clump in spring or fall, then slice the rhizomes apart so every piece keeps a few growth buds. Drop the divisions back in and they take hold and fill out over the next one to two growing seasons.
LayeringModerate
Growing season · One growing season once rooted
The plant practically layers itself for you. Its creeping rhizomes root as they push across the ground through the growing season, weaving into wider colonies as they travel. Once a stretch roots, usually within a single season, slice it free and lift it as a brand new plant.
SeedDemanding
Sow fresh seed in summer to fall · Several years to reach groundcover size
Seed is the long game, best saved for patient growers. Sow it fresh from summer into fall, since the seeds wear an oily elaiosome that ants snap up and scatter in the wild. Bank on several years before a sown patch bulks up enough to read as groundcover.
Myths
Wild ginger doubles as a safe wild swap for culinary ginger because the root smells and tastes the part.
Do not fall for it: Asarum canadense has zero relation to true ginger and carries aristolochic acid, a documented kidney toxin and known carcinogen. People once dried the root as a seasoning, but that backstory does not make it safe. No part of the plant should be eaten.