Ornamental · Buxaceae
Japanese Pachysandra
Pachysandra terminalis
Give it deep shade and rich, moist soil, and pachysandra rolls out a glossy evergreen carpet that keeps going for years.
Full shade
Every 7–14 days
USDA 4–9
6–12 in · 15–30 cm
Overview
Pachysandra earns its keep in exactly the spots that stump every other plant, the deep shade where grass throws in the towel. This evergreen groundcover hails from the boxwood family and from Japan and China, where it travels the forest floor on underground runners. Turn it loose under trees or along the shady north wall and it gets right to work, weaving a low, dark green mat that just keeps expanding.
The payoff is huge for how little it demands. It clings to those glossy leaves clear through winter, holds a tidy 6 to 12 inches (15 to 30 cm) tall, and elbows out weeds the moment it fills in. Little white flower spikes pop up in early spring, though the real draw is the foliage that carries every season.
Two things send it into high gear: shade and moving air. Plant it where the sun never scorches it and the leaves dry quick after rain, and it practically runs itself. Jam it into damp, stagnant air, though, and you hand the win to Volutella blight, the one hurdle this otherwise easygoing plant puts in your way.
Care
The short version: part to full shade, in rich, moist, well-drained soil that runs a little acidic. Water it through dry stretches, keep the bed open instead of crowded and stuffy, and clear the fallen debris, and you shut blight out before it starts.
Light
Pachysandra is a dyed-in-the-wool shade plant that wants part to full shade. Dappled light beneath trees or the shaded flank of a building is its happy place, while full sun bleaches and scorches the leaves and saps the plant's vigor.
Water
Keep the soil evenly moist, watering roughly every 7 to 14 days when the rain quits, though an established bed powers through dry shade. Water down at the base with drip instead of overhead, since wet foliage fuels Volutella blight.
Soil
Set it in rich, moist, well-drained soil that leans slightly acidic, ideally a pH of 5.5 to 6.5. Loam or clay both deliver as long as the ground drains, because soggy soil rots the roots.
Temperature
This plant is a genuine tank in the cold, shrugging off weather from about -29°F to 95°F (-34°C to 35°C). It powers through brutal winters right in the ground, though a drying winter wind can scorch leaves left out in the open.
Humidity
Everyday outdoor air keeps it thriving, so forget chasing a humidity number. What truly counts is airflow, since crowded, stagnant beds are exactly where leaf blight kicks off.
Feeding
Pachysandra barely touches its plate. A light balanced fertilizer in spring covers it, and pushing more only invites disease by forcing soft, crowded growth.
Pruning
Upkeep stays gloriously light. Thin or mow a crowded bed to get air moving, yank any diseased or scorched foliage, and rake up fallen leaves so spores lose their winter hideout.
Repotting
This is a groundcover, not a pot dweller, so it rarely lands in a container or a repot. Once it hits the ground it digs in and takes off on its own by runners.
Size & spacing
Plants hug the ground at 6 to 12 inches (15 to 30 cm) tall and each one fans out 12 to 18 inches (30 to 45 cm). Drop new divisions 6 to 12 inches apart and they charge in to close the gaps over a few seasons.
When to plant
Pachysandra is a hardy perennial that hits its stride slowly, so plant it and let it build. Set it out in spring or early fall while the soil is cool and damp, keep an eye out for the short white flower spikes in early spring, and give the bed about three years to slam shut into a full groundcover.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: spring or early fall
- Harvest: early to mid spring (April)
Hardiness
USDA hardiness zones: 4–9
Temperature: down to -34°C
Troubleshooting
Nearly every pachysandra hiccup lands in the leaves, either as bleaching from too much sun or as the spots and dieback of disease. Read the early signals and you can jump on a patch before it storms across the bed. Match what you see below, then move while your effort still pays off.
Target-ringed spots, dark stems, and dying patches
Meet Volutella leaf and stem blight, the one real challenge this plant throws at you, and it charges through crowded, damp beds. Spot the target-ringed tan blotches, stems going brown to black, and salmon-pink spore masses after wet weather. Take it on directly: cut out the infected growth on a dry day, thin the bed to get air moving, keep scale under control, and water down at the base.
Fix:
- Cut out and dispose of infected leaves and stems when dry
- Thin crowded plantings to improve air circulation
- Control scale insects
- Avoid overhead watering; use drip irrigation
- Apply fungicide during wet weather if severe
Wilting with soft black stems in soggy ground
Waterlogged ground opens the door to root and stem rot, which softens and darkens the roots and stem bases until a patch caves in. It piles up in the low, soggy corners of a bed. Get the drainage flowing, dial back the watering, and clear out any plants that have already gone down.
Fix:
- Improve drainage
- Reduce watering and avoid waterlogged sites
- Remove and discard affected plants
Speckled leaves with waxy white bumps on the stems
Those white or brown crusts riding the stems and leaf undersides are euonymus scale, and fine stippling with a bit of webbing flags spider mites moving in. Both quietly bleed the plant and knock the shine off. Snip out the worst stems, hit the scale with horticultural oil, and stay on it, because scale rolls out the welcome mat for Volutella blight.
Fix:
- Prune out heavily infested stems
- Apply horticultural oil for scale
- Manage mites with appropriate miticide or oil
Leaves washing out pale or scorching brown
Catch this one early and it turns around fast. Pachysandra thrives in shade, so too much sun is what drains its glossy green to yellow and crisps the edges, and drying wind or a harsh winter will do the same. Move the plant into part or full shade, keep the soil rich and moist, and watch the deep green rush back.
Fix:
- Transplant to part or full shade
- Provide a moist, organically rich site
- Water during drought and avoid hot, exposed locations
Toxicity
Great news for a busy household: pachysandra plants safely around pets, livestock, and kids. It never made the ASPCA toxic list, and while a mouthful of leaves might leave a nosy cat or dog briefly queasy, nothing serious comes of it. Put it in wherever animals and children roam and stop worrying about it.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Cats can prowl the bed freely. A curious nibble might bring a bit of drool or a mild stomach upset, and that is the whole story.
Dogs None
Dogs can romp through the garden with zero worry. The leaves stay off the ASPCA toxic list, and a mouthful buys nothing worse than a short spell of queasiness.
Horses None
Horses come to no harm beside this groundcover. No toxin here touches them, and they mostly stroll right past the low, glossy carpet anyway.
Rabbits None
Rabbits are perfectly safe nearby. Wild and pet rabbits nibble around it with no trouble at all, even though it never tops their menu.
Livestock None
Cattle, goats, and sheep can graze right up to it safely. In the little they might sample, the plant packs nothing that upsets a grazing animal.
Birds None
Birds have nothing to fear here. Loads of them dive into the dense mat for cover and foraging, and the leaves and stems never bother them.
People None
People are in the clear with this groundcover. Nobody eats it and it isn't poisonous, so it plants worry-free right where the kids play.
Discourage pets from chewing the foliage; not listed among ASPCA toxic plants but the alkaloid-containing leaves can irritate.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
United Kingdom
Animal PoisonLine: 01202 509000 (fee applies)
Australia
Animal Poisons Helpline: 1300 869 738
Varieties
A handful of standout selections turn up beside the plain species. These are the ones to chase down when you shop.
Green Carpet
A compact, low grower that gardeners snap up for its rich, glossy dark green leaves.
Variegata (Silveredge)
Its white-margined leaves stand out, though it grows slower and with less push than the plain green form.
Pachysandra procumbens (Allegheny spurge)
A clumping native with matte blue-green leaves mottled purple and white that stays put far more than P. terminalis.
How to propagate
Pachysandra is a joy to multiply from plants already in the ground, and that is the route nearly every gardener grabs instead of wrestling with seed.
DivisionEasy
Spring or early fall · About three years to fill in as a groundcover
Division is the fun, low-effort way to spread pachysandra fast across a shady run. Dig up an established clump or a rooted runner in spring or early fall, drop the pieces 6 to 12 inches apart, and let them race to knit together over about three years into a solid groundcover.
Stem cuttingsEasy
Late spring to summer · Several weeks to root
Want more plants in a hurry? Snip tip cuttings from late spring through summer, tuck them into a moist medium, and they strike roots in a few weeks. It is a satisfying way to multiply a planting straight from the growth already going.
SeedModerate
Spring · Slow and seldom used
Seed sown in spring works, but it crawls and almost nobody bothers. Divisions and cuttings win every time, coming true and rooting into a bed far quicker than seed ever manages.
Myths
Pachysandra grows well in full sun.
Not a chance, it is a shade groundcover to the core. Push it into full sun and wind and the foliage yellows, bleaches, and scorches, and that sun stress hands Volutella blight an opening. Plant it in part to full shade and it delivers the deep, glossy green it is famous for.