How to Grow Sweet Potato Vine 'Blackie'
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Sweet Potato Vine 'Blackie'
Ipomoea batatas 'Blackie'
vine'Blackie' is a stunning ornamental sweet potato vine cultivar prized for its deeply lobed, dark purple-black foliage that creates dramatic contrast in container gardens and landscapes. It grows as a vigorous trailing vine that can reach 6-10 feet in length, making it ideal for hanging baskets, window boxes, and garden beds. The dark, heart-shaped leaves with deeply cut edges are the main attraction, though it may produce small morning glory-like flowers.
When should you plant Sweet Potato Vine 'Blackie' in your zone?
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Example Sweet Potato Vine 'Blackie' timeline · Pittsburgh, PA (Zone 6b)
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Plant Sweet Potato Vine 'Blackie'
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Sweet Potato Vine 'Blackie'
Around May 17≈ 30 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 9b-11, grown as an annual in cooler zones
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Establishment
2-4 weeksSmall transplants with light green to purple-tinged foliage beginning to establish roots
Plant after last frost when soil is warm (65°F+). Keep consistently moist but not soggy. Pinch early growth to encourage bushiness if desired. Provide bright light.
Rapid Vegetative Growth
4-8 weeksVines elongate rapidly, leaves become deeply lobed and develop their characteristic dark purple-black color, creating full, lush growth
Maintain consistent moisture. Apply balanced fertilizer every 2-3 weeks. Guide vines onto trellises or allow to cascade. Provide full sun for deepest color development.
Peak Foliage
8+ weeksMature, fully developed dark foliage blankets the vines completely; plant reaches maximum size and color intensity
Continue regular watering and fertilizing. Pinch back excessively long vines to maintain shape. Monitor for pests. Foliage color intensifies with cooler fall temperatures.
Flowering (Optional)
Summer through early fall (intermittent)Small, trumpet-shaped pale purple or pink flowers may appear among the foliage, though flowering is not the plant's main feature
Flowers are inconspicuous and not essential to the plant's ornamental value. Deadheading is unnecessary. Flowering may decrease in very hot climates.
Fall Decline
4-6 weeks before frostAs temperatures drop below 50°F, growth slows, foliage may thin slightly, and the vine prepares for dormancy or frost damage
Reduce watering frequency. Bring potted plants indoors before the first frost. In zones 9b-11, mulch around base to protect from occasional frost. Plant is killed by hard freeze.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use neem oil or insecticidal soap if severe. Increase humidity to discourage colonization.
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Use yellow sticky traps; spray with insecticidal soap or neem oil. Encourage natural predators like ladybugs.
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Spray with water or insecticidal soap. Use neem oil for persistent infestations. Introduce beneficial insects.
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Remove with soft brush and water spray; apply horticultural oil or neem oil if needed.
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Use reflective mulches; apply insecticidal soap or neem oil. Remove heavily infested leaves.
Uses
Container and Landscape Design
Craft'Blackie' is widely used as a trailing plant in mixed container gardens, hanging baskets, window boxes, and as groundcover in tropical or warm-climate landscapes. Its dark foliage creates dramatic contrast with lighter-colored plants and attracts attention in garden designs. [source]
Indoor Houseplant
HouseholdThe vine can be grown indoors in bright, sunny locations as a houseplant, draped from shelves or trained onto moss poles. It adds tropical flair to interior spaces when provided with adequate light and humidity. [source]
Pollinator Attraction
WildlifeThe flowers attract pollinators including bees and hummingbirds, supporting local pollinator populations in gardens where flowering occurs. [source]
Foliage Arrangements
CraftThe striking dark purple-black foliage is valued by florists and gardeners for use in fresh or dried arrangements, wreaths, and other craft projects that benefit from dramatic color and texture. [source]
Harvest Tips
Sweet Potato Vine 'Blackie' is grown exclusively for ornamental foliage and is not harvested for food. Pinch or prune growing tips throughout the season to encourage bushier, fuller growth and maintain desired shape. Cuttings can be propagated in water or moist soil to create new plants. In frost-free zones, the plant can be cut back hard in late winter and will regrow vigorously from the base.
Fun Facts
- 🌱 'Blackie' is a cultivar of Ipomoea batatas, the same species that produces edible sweet potatoes, but this ornamental variety is bred specifically for foliage color rather than tuber production.
- 🌱 The deep purple-black color of 'Blackie' foliage intensifies in cooler fall temperatures and with bright sunlight exposure, sometimes appearing almost black in optimal conditions.
- 🌱 Sweet Potato Vine 'Blackie' is closely related to morning glories and shares similar trumpet-shaped flowers, though in this cultivar flowering is secondary to the spectacular foliage display.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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