Shrub · Lardizabalaceae
Chocolate Vine
Akebia quinata
Fragrant chocolate-purple flowers and edible fruit on a climber that grows fast and likes to be kept in line.
Full sun
Every 7–14 days
USDA 4–8
20–40 ft · 6.1–12.2 m
Overview
Want a climber with a bit of drama? Chocolate vine twines up fast and flowers early, and you'll usually smell its chocolate and vanilla-spice scent before you spot the blooms. They're a deep chocolate-purple, and if there's a second, different plant nearby they turn into those odd little sausage-shaped fruit with sweet, edible white pulp inside. Look at the five-fingered leaves and the nickname five-leaf akebia makes sense right away.
Here's the thing, it's almost impossible to put in a bad spot. It's fine from zone 4 to zone 8, it doesn't care whether it gets full sun, part shade, or even full shade, and it'll grow in poor loam, sand, or clay without a fuss. Once it's rooted in, it handles dry spells too. That go-anywhere streak is exactly why people love it.
But that same go-anywhere streak has a catch. Left to its own devices, chocolate vine will slip past its spot and smother native plants, which is why much of the eastern, mid-Atlantic, and southern United States treats it as invasive. So plant it somewhere you can cut it back hard and keep it from creeping into everything else.
Care
The short version: pop it into well-drained soil in sun or shade, water it while it settles, and then just be ready to prune it hard, because with chocolate vine the real job isn't growing it, it's keeping it in bounds.
Light
It's happy in full sun, partial shade, or even full shade, which is honestly part of why it spreads so well. Full sun gets you the most flowers and fruit, but a shadier corner still gives you loads of leaf and stem.
Water
While it's getting established, give it regular water in well-drained soil, a good soak every 7 to 14 days once the top half of the soil's dried out. After that? The roots take over and it handles dry stretches just fine, so a missed watering isn't a big deal.
Soil
It isn't picky at all and takes pretty much any well-drained loam, sand, or clay. A pH from 5.5 to 7.5 works, so most ordinary garden soil is good to go without you amending anything.
Temperature
This one's seriously tough, comfortable from about -29°F to 100°F (-34°C to 38°C). That covers USDA zones 4 through 8, so even a brutal winter won't faze it.
Humidity
Whatever the outdoor air's doing is fine, so there's no number to keep an eye on. It just rolls with the moisture it gets.
Feeding
A balanced general-purpose fertilizer in spring is plenty, and honestly you can skip it most years. It already grows vigorously on its own, so feeding it just hands you more to cut back later.
Pruning
Pruning's really the main gig here. Cut it back hard right after it flowers in late spring, since the blooms form on old wood, and if it's gotten out of hand you can cut it right to the ground to start over. Plan on tidying it again through the season too.
Repotting
You'll rarely see it grown in pots, so repotting barely comes up. If you do keep it contained, just bump it up a size when the roots circle or escape, the top growth stalls, or the soil dries out really fast.
Size & spacing
Give it something to climb and it'll hit 20 to 40 feet (6 to 12 m) with a spread of 6 to 9 feet (183 to 274 cm). Put it on a sturdy trellis, arbor, or fence with some room away from shrubs and trees it might otherwise swallow.
When to plant
It keeps a pretty simple schedule. Flowers show up early, from March into May, and if a second plant's nearby the fruit fills out through fall. Plant new ones in spring once the last frost's gone, and save your hard pruning for right after the flowers fade, because next year's blooms form on old wood and you don't want to snip them off by mistake.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: Late winter to early spring after cold stratification
- Plant: Spring after last frost
- Harvest: Flowers March to May; sausage-shaped fruit ripens in fall
Hardiness
USDA hardiness zones: 4–8
Temperature: down to -34°C
Troubleshooting
Good news first: most chocolate vine trouble is about too much growth, not too little. It's tough to slow down and even tougher to get rid of, and a single plant will often flower its head off without setting any fruit. Find what matches below, and step in early while it's still easy.
Vine creeping over your shrubs and small trees
This is that invasive habit that makes chocolate vine such a headache across much of North America. It twines 20 to 40 feet, mats over whatever it climbs, and roots anywhere a stem touches the ground. So cut it back hard after it flowers, keep at it through the season, and dig out the runners before they kick off a whole new colony.
Fix:
- Cut back hard after flowering and repeat through the season to keep it in bounds
- Cut to the ground to renovate an overgrown vine
- Trace and dig out long roots (a single vine can produce roots 22 ft long); remove rooted stem nodes and seedlings
An established vine that just won't quit
The reason it's so hard to kill is that deep root system, which can run 22 feet and resprout from any scrap left behind. Cut stumps and severed roots just push out fresh growth, and stray seedlings fill in the rest. Dig out as much root as you can, treat the cut stumps, and keep yanking the resprouts until they finally give up.
Fix:
- Dig out as much of the root system as possible
- Cut and treat cut stumps, then monitor and remove resprouts and seedlings repeatedly
Flowers everywhere, but no sausage-shaped fruit
Wondering why all those flowers aren't turning into fruit? Chocolate vine is self-incompatible, so one plant alone can bloom for years and never set a single pod. It also wants a long, warm season to ripen anything. Grow two genetically different plants close together, or hand-pollinate the flowers with pollen from another vine.
Fix:
- Plant two or more genetically different individuals for cross-pollination
- Hand-pollinate female flowers with pollen from a different plant
Toxicity
No need to stress about this one around pets or people. It's not on the ASPCA toxic-plant lists, and the white pulp of the ripe fruit is actually eaten in parts of East Asia. The real worry is ecological, not toxic, since the vine spreads fast and smothers native plants, so the question is really where you plant it, not who might take a bite.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
A nosy cat's got nothing to worry about, since chocolate vine isn't on the ASPCA toxic list. Sure, a big mouthful of any plant can upset a stomach, but the vine itself has no known poison in it.
Dogs None
Dogs are fine here. A pup that chews a leaf or a dropped fruit won't get poisoned, though wolfing down a pile of greenery can loosen a stomach the way any plant would.
Horses None
There's no toxin that bothers horses, so they can graze right next to it without any trouble.
Rabbits None
Rabbits can munch the leaves with zero toxic risk. Just bring in any new browse slowly, like you would with any fresh green, so their digestion stays settled.
Livestock None
Cattle, goats, and sheep won't be poisoned by it either. The actual problem is the plant taking over a paddock, not hurting whatever's grazing there.
Birds None
Birds aren't poisoned by it, and they're happy to eat the ripe fruit, which is exactly how the seeds end up spread into new ground.
People None
That white pulp inside the ripe sausage-shaped fruit is edible and eaten in parts of East Asia. The rest of the plant isn't food, though, so stick to the ripe fruit and treat everything else as ornamental.
No special handling needed for pet safety. The main risk is ecological invasiveness, not poisoning.
Varieties
Past the usual purple-flowered plant, you'll run into a few named forms, mostly picked for a different flower color or a fancier leaf.
'Alba' (also sold as 'Shirobana')
A white-flowered form that trades the usual chocolate-purple bloom for pale flowers and pale, whitish fruit.
'Rosea'
This one's softer, blooming in pink to rose-purple instead of that deep chocolate shade.
'Variegata'
You'd grow this for the leaves, which come mottled and splashed with white and cream.
Akebia trifoliata (three-leaf akebia)
More of a cousin than a cultivar, it's got three leaflets per leaf where Akebia quinata has five.
How to propagate
Making more is easy, maybe a little too easy, because the same thing that makes layering a breeze is what lets the vine wander off on its own.
SeedModerate
Sow fresh seed in fall, or cold-stratify and sow in late winter to early spring · Several months to a year
Seed's the slow lane, mostly because the plant's self-incompatible, so you'll need two genetically different vines just to get viable seed at all. Sow it fresh in fall, or give it a cold spell and sow in late winter to early spring. And patience helps, since it can take anywhere from several months to a year before a seedling's settled and growing on its own.
LayeringEasy
Spring to summer · One growing season
Layering's the easy way to go. Pin a stem to the soil in spring or summer and it'll root on its own within a single growing season, then you just sever it and move it. The catch? That same eager rooting is exactly what lets the vine spread where you'd rather it didn't.
Stem cuttingsModerate
Summer (semi-ripe wood) · Several weeks to root
Take semi-ripe cuttings in summer and root them over bottom heat, which usually only takes a few weeks. Once they've got roots, pot each one on and let it grow a bit before it heads outside.
Myths
The flowers must be edible because the plant is called chocolate vine.
Tempting logic, but the name's about the flowers, not a snack. They're chocolate-purple and give off a chocolate and vanilla-spice scent, and that color and smell are really the whole reason for the name. Only the white pulp of the ripe sausage-shaped fruit is actually eaten.