How to Grow Bulbosa
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Bulbosa
Oxalis bulbosa
vegetableOxalis bulbosa is a South American tuber-producing plant cultivated for its small, bulbous underground structures that are eaten as a vegetable. The plant produces delicate clover-like foliage and small yellow or pink flowers. It was historically important in Andean cuisine and is experiencing renewed interest among specialty gardeners.
When should you plant Bulbosa in your zone?
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Example Bulbosa timeline · Pittsburgh, PA (Zone 6b)
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Plant Bulbosa
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 Bulbosa
Around Aug 15≈ 120 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Bulbosa dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in warm zones 9-11; can be grown in cooler zones as an annual or with protection
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Get my Bulbosa timeline →Growth Stages
Sprouting
2-3 weeksSmall green shoots emerge from planted bulbs; clover-like leaves begin to develop
Keep soil warm (60-70°F) and consistently moist. Ensure good drainage to prevent rot.
Vegetative Growth
6-8 weeksPlant develops bushy foliage with characteristic three-lobed oxalis leaves; stem growth increases
Maintain even moisture and regular fertilization with balanced or slightly phosphorus-rich fertilizer every 3-4 weeks
Flowering
4-6 weeksDelicate yellow or pink flowers appear among the foliage; plant reaches full height
Continue regular watering and feeding. Flowers indicate bulb development is underway.
Bulb Development & Maturation
6-8 weeksUnderground bulbs enlarge and mature; foliage begins to yellow and weaken
Gradually reduce watering as foliage dies back. Stop fertilizing. Allow soil to dry between waterings.
Dormancy & Harvest
Variable (2-4 weeks)Foliage dies back completely; plant goes dormant. Bulbs are ready for harvest and storage.
Allow soil to dry out completely. Carefully excavate bulbs, cure in cool dry conditions for 1-2 weeks before storage.
Common Pests
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Spray with neem oil or insecticidal soap; encourage beneficial insects like ladybugs
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Increase humidity, mist foliage regularly, use miticide if severe
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Remove by hand, use copper tape barriers, apply diatomaceous earth around plants
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Ensure excellent drainage, avoid overwatering, use well-draining soil mix, remove affected plants
Uses
Underground tuber vegetable
CulinaryThe small bulbs are eaten cooked or raw, with a slightly sweet, chestnut-like flavor and crisp texture. They can be boiled, roasted, or added to soups and stews. [source]
Leaf garnish and acidic flavoring
CulinaryThe young leaves add a tart, lemony flavor to salads and can be used as an edible garnish. They contain oxalic acid, giving them their characteristic sour taste. [source]
Traditional South American staple
HouseholdBulbosa was a major food crop in pre-Columbian Andean civilizations and remains culturally significant in South American cuisine. [source]
Traditional herbal remedy
MedicinalIn traditional medicine, oxalis plants have been used to aid digestion and treat minor gastrointestinal issues, though scientific evidence is limited. [source]
Pollinator attraction
WildlifeThe delicate flowers attract bees and other pollinators, making it a useful addition to gardens supporting beneficial insects. [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 after 120-150 days when foliage yellows and dies back. Carefully dig up bulbs without damaging them. Cure bulbs in a cool, dry, dark place for 1-2 weeks. Store in cool conditions (40-50°F) in dry sand or peat moss. Bulbs can be harvested fresh and eaten immediately, or stored for several months.
Fun Facts
- 🌱 Oxalis bulbosa was a staple crop of the Inca Empire and remains known locally as 'oca' or 'aricuma' in South America.
- 🌱 The plant's leaves are sensitive to light and temperature changes, folding up at night or during cool weather—a behavior called nyctinasty.
- 🌱 Bulbosa bulbs have been used for centuries in Peruvian and Bolivian cuisine and are still sold in Andean markets today.
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