Ornamental · Convolvulaceae
Ornamental Sweet Potato Vine
Ipomoea batatas
Hand this vine sunshine, heat, and regular moisture and it races over pot rims and bed edges in a rush of colorful leaves all season long.
Full sun
Every 2–5 days
50–95°F · 10–35°C
USDA 9–11
Overview
Ornamental sweet potato vine is all about the leaves, and the roots barely rate a mention. It is the same species as the food crop, Ipomoea batatas, but bred for bold foliage that runs from chartreuse to a near-black purple. Plant it in a bed or a pot and it pours over the edges in a hurry, knitting a low carpet of color as it goes.
This is a warm-weather grower that will not stand for frost. It thrives across hardiness zones 9 to 11 and runs as an annual everywhere colder, leafing out fast the moment the soil warms and dropping away at the first hard cold. One plant can charge out to 8 to 10 feet (2.4 to 3 m) wide while staying just inches tall, which makes it a knockout tumbling over walls and pot rims.
Best of all, it asks for almost nothing. Give it sun, warm soil, and water that never runs dry, and it grows so freely that trimming becomes the main event. It flowers here and there in pale pink to violet funnels, but make no mistake, the foliage is the whole point and the reason it earns a spot every summer.
Care
The short version: full sun to a little shade, evenly moist soil rich in organic matter, and warmth above frost. Feed it through the season, trim it whenever it overruns its space, and run it as an annual where winters bite.
Light
Plant it in full sun to fire up the deepest leaf color, though it takes partial shade without a fuss. The dark-leaved kinds hold their color best when the light pours in, and in shade they slide greener.
Water
Keep the soil evenly moist and it grows like a rocket, but once established the vine shrugs off a dry spell. Containers dry out fastest and will wilt as a clear watering cue, so check pots in full sun every couple of days through summer.
Soil
Load it up with loamy, well-draining soil worked full of organic matter. A slightly acidic pH of 5.5 to 6.5 suits it, and the good drainage keeps the roots from sitting wet.
Temperature
It runs best in the warmth between 50°F and 95°F (10°C to 35°C) and stalls in the cold. Frost kills it outright, so never leave it out through a freeze.
Humidity
Average outdoor humidity is plenty, and there is no number to chase. The vine takes muggy summer air in stride, though good airflow helps keep leaf fungus from settling in.
Feeding
Feed it every two weeks through the growing season with a balanced water-soluble fertilizer to keep the foliage pumping. A high-phosphorus starter at transplanting gives new plants a strong launch.
Pruning
Trim the vines anytime in the growing season to rein in the spread and keep beds or pots sharp. It takes a hard cutback in stride and rockets right back, so cut with confidence.
Size & spacing
Count on a low mound just 6 to 12 inches (15 to 30 cm) tall that sprawls 8 to 10 feet (2.4 to 3 m) wide. Give it room to run or plan to trim, because one plant blankets a lot of ground in a season.
When to plant
This vine waits on warmth and drops at the first frost, so timing lines up with the heat. Start tubers or cuttings indoors a few weeks before the last frost, launch the plants outside once the soil has warmed in late spring, and let them run flat out until cold weather ends the season.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Sow: Not typically started from seed; start tubers or root stem cuttings indoors 4 to 6 weeks before the last frost.
- Plant: Set out plants after all danger of frost has passed and soil has warmed in late spring.
- Harvest: Grown for foliage; rarely flowers (pale pink to violet funnel-shaped blooms). Tubers can be dug in fall before first frost.
Hardiness
USDA hardiness zones: 9–11
Temperature: down to -7°C
Troubleshooting
Trouble on this vine flags itself on the leaves first, whether from thirst, a fungus, or something taking bites. Most of it is cosmetic and quick to head off. Match what you see below and jump on it before it spreads.
Blotches and leaf spots multiplying through the foliage
Those blemishes are fungal leaf diseases, and they charge in when the vine lands in the same ground year after year. Pack the leaves in tight and humid, and the spores grab their chance. Snap off the marked leaves, open the planting so air rushes through, and give the vine a brand new spot next season to bounce back clean.
Fix:
- Remove and discard affected foliage
- Improve air circulation and avoid overhead watering
Leaves going limp on a hot afternoon
Good news, this is only drought stress and not a disease, and it hits the pots that roast in full sun first. The vine is racing through water faster than the soil can hand it over. Give it a deep soak until it pours from the drainage holes, then bump up how often you water containers through the hottest weeks, and it springs back fast.
Fix:
- Water thoroughly until it drains from the bottom
- Increase watering frequency for containers in full sun
Chewed edges, punched holes, and stippled leaf surfaces
Three usual suspects tear into this vine: flea beetles, thrips, and slugs, and they leave the foliage looking chewed. Hunt for tiny hopping beetles, the dusty speckling thrips scratch into the surface, or the shiny trails slugs drag behind them. Grab or trap the slugs, chase down the beetles and thrips, and rake out the leaf litter that shelters all three, and the vine roars back.
Fix:
- Hand-pick or trap slugs
- Monitor and treat flea beetle and thrips populations as needed
Toxicity
Great news for pet owners: this vine is safe. The ASPCA lists Ipomoea batatas as non-toxic to cats, dogs, and horses, and it poses no threat to rabbits, livestock, birds, or people. The tubers are even edible, just blander than the kinds grown for eating.
Safe for
People · Cats · Dogs · Horses · Rabbits · Livestock · Birds
Cats None
Cats get the green light. The ASPCA lists Ipomoea batatas as non-toxic, so a curious nibble will not poison them.
Dogs None
No toxic compounds lurk in it, and the ASPCA clears it for dogs. A pup that chews a trailing vine walks away just fine.
Horses None
Horses can graze near it without a worry, since the ASPCA rates the plant non-toxic to them.
Rabbits Safe
Rabbits are covered. Nothing in the leaves or stems threatens them, so a stray bite causes no trouble.
Livestock Safe
Cattle, goats, and sheep can roam near the foliage without risk, since it carries none of the toxins that worry farmers.
Birds Safe
Pet and backyard birds are all clear. The plant holds no compounds that would harm them.
People Safe
Handle it and grow it around children with ease. The tubers are even edible, just less tasty than the kinds bred for the kitchen.
Varieties
Most of the fun comes down to leaf color and shape. These are the cultivars you will run into most often.
Blackie
It flaunts deeply lobed leaves in a purple so dark it reads as near-black clear across the bed.
Margarita
It fires up a planting with electric chartreuse-green heart-shaped foliage.
Sweet Caroline Group
It rolls out in green, red, or dark purple with divided or heart-shaped leaves, ready to match almost any scheme you dream up.
Tricolor
It shows off variegated green foliage splashed with pink and white.
How to propagate
This vine multiplies with almost no effort, so turn one plant into a crowd from cuttings or by splitting its stored tubers come spring.
Stem cuttingsEasy
Take 8 to 10 inch cuttings from vigorously growing terminal or middle vine sections in the warm growing season. · Roots typically develop in about 4 to 5 weeks.
Cuttings turn one vine into many with barely any fuss. Through the warm growing season, snip 8 to 10 inch pieces off the tips or middle of a strong vine and drop them into water or moist soil, where roots push out in about 4 to 5 weeks. Hold the rooted cuttings until frost clears, then plant them outside and watch them run.
DivisionEasy
In spring after last frost, divide stored tubers into sections. · Several weeks to sprout and establish.
Splitting the stored tubers in spring, once the last frost lifts, opens up a second easy route. Slice each tuber so every section keeps at least one eye, then drive the pieces straight into outdoor soil. They take several weeks to sprout and dig in before they take off.
Myths
This vine is unsafe around pets since it comes from the same clan as the morning glories.
Not a chance. The ASPCA lists Ipomoea batatas as non-toxic to cats, dogs, and horses. That toxic-seed worry pins on the ornamental morning glories, Ipomoea tricolor and I. violacea, whose seeds carry LSA and other indole alkaloids. Sweet potato vine shares the family name, not the danger.
Tubers from the ornamental varieties can never be eaten.
Go ahead and eat the tubers of the ornamental cultivars. They simply taste blander than the kinds bred for the dinner table, so growers chase them for the leaves rather than the flavor.