How to Grow Asian Purple Yam
Wikimedia Commons
Asian Purple Yam
Dioscorea alata
vegetableAsian Purple Yam is a tropical vine producing starchy tubers with distinctive purple or violet flesh and high nutritional value. Also known as Ube in the Philippines, it's a staple carbohydrate crop in Southeast Asia and the Pacific Islands. The plant requires a long growing season and warm, humid conditions to thrive.
Looking for a specific variety?
When should you plant Asian Purple Yam in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Asian Purple Yam timeline · Pittsburgh, PA (Zone 6b)
-
Plant Asian Purple Yam
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Asian Purple Yam
Around Nov 3≈ 200 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Asian Purple Yam dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in USDA zones 10-11; can be grown in zones 8-9 with protection and shorter varieties
Sign up free to see if Asian Purple Yam grows in your zone — and get a personalized planting timeline.
Get my Asian Purple Yam timeline →Growth Stages
Sprouting & Establishment
3-4 weeksTuber pieces or seed yams develop first roots and shoots; initial vines emerge with simple heart-shaped leaves
Keep soil consistently moist but not waterlogged; provide support stakes or trellising from the start; ensure warm soil temperature (75-85°F); apply mulch to retain moisture
Vegetative Growth
12-16 weeksVigorous vine growth with heart-shaped leaves becoming more abundant; climbing vines extend rapidly along supports; root system expands underground
Provide sturdy vertical supports or trellis system (8-10 feet tall); monitor for pests weekly; maintain consistent soil moisture; apply balanced fertilizer monthly; prune lateral shoots if desired
Flowering & Vine Maturity
4-8 weeksSmall flowers may appear on vines (though flowering is inconsistent); vine growth slows naturally; leaves remain vibrant and full
Continue supporting growing vines; reduce nitrogen fertilizer to avoid excessive foliage; monitor moisture levels; watch for sign of nutrient deficiency
Tuber Bulking
8-12 weeksVines begin to yellow and die back as energy directs to underground tuber expansion; tubers accumulate starch and develop characteristic purple color
Reduce watering gradually as vines senescence; discontinue fertilizing; allow natural vine die-back; avoid disturbing soil to prevent tuber damage
Harvest Ready
At maturity, ready to harvestVines are mostly brown and withered; tubers are mature, firm, and fully purple; skin has hardened
Monitor weather for first light frost; harvest before ground becomes waterlogged; cure tubers in warm, dry location for 2-3 weeks before storage
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Hand-pick beetles; use neem oil spray; encourage natural predators; apply kaolin clay for prevention
-
Spray with insecticidal soap; use horticultural oil; prune heavily infested vines
-
Increase humidity and irrigation; use sulfur dust; apply neem oil every 7-10 days
-
Remove infected leaves; ensure good air circulation; apply copper fungicide; avoid overhead watering
-
Use virus-free seed yams; control aphid vectors with neem oil; remove infected plants immediately
Uses
Traditional Southeast Asian Cuisine
CulinaryPurple yam is a staple ingredient in Southeast Asian cooking, used boiled, roasted, steamed, or mashed. Most famously, it's a key ingredient in Filipino ube ice cream, desserts, and savory dishes like ube halaya (a sweet purple paste). [source]
Nutritious Starch Alternative
CulinaryRich in resistant starch, antioxidants, and minerals including potassium and manganese. Lower glycemic index compared to white potatoes, making it suitable for various dietary needs. [source]
Traditional Medicine Applications
MedicinalUsed in traditional Asian medicine for digestive support and as a tonic for general health. Contains anthocyanins and polyphenols with potential anti-inflammatory properties. [source]
Natural Food Coloring
HouseholdThe natural purple pigment can be extracted and used as a food dye for baking and cooking without artificial additives. Creates vibrant purple and blue hues in various preparations. [source]
Beneficial Vine Coverage
WildlifeThe extensive vine growth provides habitat and shelter for beneficial insects and pollinators. Can be used as an ornamental privacy screen while producing food. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest 200-300 days after planting when vines have mostly died back and leaves are brown. Carefully dig with a fork or spade 12-18 inches away from the plant base to avoid damaging tubers. Handle tubers gently as bruises lead to rot. Cure harvested tubers in a warm (75-80°F), humid location for 2-3 weeks to harden skin. Store in a cool (50-60°F), dry, dark place with good air circulation; properly cured tubers can store 3-6 months.
Fun Facts
- 🌱 Asian Purple Yam (Ube) can produce tubers weighing 2-5 pounds each, with some exceptional specimens reaching 10+ pounds in ideal conditions.
- 🌱 The purple color comes from anthocyanin pigments, the same compounds found in blueberries and red cabbage, which have antioxidant properties.
- 🌱 In the Philippines, ube is so culturally significant that 'Ube Month' celebrations occur annually, and the purple yam is featured in numerous desserts, from ice cream to pastries to traditional kakanin (rice cakes).
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Asian Purple Yam planting timeline
Tell us your zip code and we'll calculate exactly when to start Asian Purple Yam seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Asian Purple Yam timeline →