How to Grow Asparagus Pea
iNaturalist
Asparagus Pea
Lotus tetragonolobus
vegetableAsparagus pea is a unique legume that produces small, winged, square-shaped pods with a delicate asparagus-like flavor when harvested young. The plant is a bushy, climbing vine native to the Mediterranean and North Africa, valued for its tender edible pods and ornamental appeal. It's a relatively rare heirloom vegetable that combines culinary interest with attractive red flowers.
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Example Asparagus Pea timeline · Pittsburgh, PA (Zone 6b)
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Plant Asparagus Pea
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 Asparagus Pea
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Asparagus Pea dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 6b-9b; grows best in warm seasons with moderate temperatures
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Get my Asparagus Pea timeline →Growth Stages
Germination & Seedling
2-3 weeksSeeds sprout within 2-3 weeks; seedlings emerge with two small cotyledons followed by true leaves. Young plants are delicate and tender.
Maintain consistent moisture and warm soil temperatures (65-75°F). Thin seedlings to proper spacing once they have 2-3 true leaves. Protect from strong winds.
Vegetative Growth
4-6 weeksPlant develops bushy foliage with compound leaves and climbing tendrils. Stems become more robust and the plant reaches 12-24 inches in height.
Provide climbing support or trellis. Water consistently and apply mulch to retain moisture. Fertilize monthly with balanced fertilizer or compost. Pinch back growth tips to encourage bushiness.
Flowering
2-3 weeksBeautiful small red or coral flowers appear in clusters along the stems. Flowers are ornamental and attract pollinators.
Ensure good air circulation to prevent fungal issues. Reduce nitrogen fertilizer to avoid excessive foliage at the expense of flowers. Maintain moderate watering.
Pod Development & Fruiting
3-4 weeks peak productionAfter pollination, small square-shaped pods develop with distinctive winged edges. Pods are typically 1.5-2 inches long when mature for harvest.
Monitor plants daily for pod development. Keep soil evenly moist to prevent pod splitting. Begin harvesting as soon as pods reach ideal size to encourage continued production.
Mature/Harvest
4-6 weeks total harvest periodPods reach full size with tender flesh ideal for eating. If left unharvested, pods become fibrous and tough; seeds develop inside.
Harvest every 2-3 days while pods are tender and still have a slight give when gently squeezed. Remove any overripe or yellowing pods to maintain plant vigor and continued flowering.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with water to dislodge; use insecticidal soap or neem oil; encourage beneficial insects like ladybugs
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Increase humidity and mist foliage; spray with neem oil; ensure good air circulation
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and
Handpick in early morning or evening; use copper tape around plant bases; beer traps; diatomaceous earth
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Improve air circulation; avoid overhead watering; spray with sulfur or potassium bicarbonate fungicide; remove affected leaves
Uses
Fresh Cooking & Asparagus Substitute
CulinaryYoung pods can be steamed, stir-fried, or boiled whole and have a delicate flavor reminiscent of asparagus combined with snap peas. Often served simply with butter or olive oil to showcase the subtle, tender taste. [source]
Salads & Raw Consumption
CulinaryYoung, tender pods can be sliced thin and added raw to salads for a crisp, lightly asparagus-flavored bite. The distinctive winged shape adds visual interest to dishes. [source]
Ornamental Garden Feature
HouseholdThe plant's attractive red flowers and winged pods make it a beautiful addition to ornamental gardens and vegetable borders. Often grown as much for visual appeal as for food production. [source]
Nitrogen Fixation Soil Benefit
CulinaryAs a legume, asparagus pea fixes atmospheric nitrogen and improves soil fertility when incorporated back into the garden after harvest. Beneficial for crop rotation and sustainable gardening practices. [source]
Pollinator Garden Support
WildlifeThe bright red flowers attract bees, butterflies, and other beneficial pollinators, making asparagus pea a valuable companion in pollinator-focused gardens. [source]
Harvest Tips
Harvest pods when young and tender, approximately 1.5-2 inches long, about 60-90 days after planting. Pods should snap easily when bent and feel slightly flexible rather than rigid. Pick every 2-3 days to encourage continuous flowering and new pod production. Best flavor is obtained by harvesting in the morning after dew has dried. Use scissors or gentle hand-picking to avoid damaging vines. Harvest regularly to prevent pods from becoming tough and fibrous.
Fun Facts
- 🌱 Asparagus pea is also known as winged pea, dragon pea, or Goa bean, and despite its name, it is unrelated to true asparagus (Asparagus officinalis).
- 🌱 The distinctive four-winged square shape of the pods is where the scientific name 'tetragonolobus' comes from—'tetra' meaning four and 'gonus' meaning angle.
- 🌱 This heirloom vegetable was popular in Victorian kitchen gardens but nearly disappeared from cultivation, making it a rare find in modern seed catalogs and contributing to its growing popularity among heirloom gardeners.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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