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Edamame Early Thunder

Glycine max

vegetable

Early Thunder is a high-yielding edamame variety that produces tender, sweet soybeans in their pods, ready for harvest in just 65-75 days. This cultivar is bred for northern climates and shorter growing seasons, making it ideal for cool-season regions. The plants grow 24-28 inches tall with robust branching and consistently produce plump, flavorful pods.

Growing Conditions

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Sun: Full sun, 6-8 hours daily minimum
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Water: Moderate and consistent moisture; provide 1-1.5 inches per week. Keep soil evenly moist but not waterlogged, especially during pod development.
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Spacing: 4 inches
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Days to maturity: 65-75 days
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Planting depth: 1

Soil

Type: Well-draining loamy soil with good organic matter
pH: 6.0-7.0
Amendments:
Compost aged manure phosphorus-rich fertilizer

Growing Zones

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Zones 3-7 are ideal; thrives in cooler climates and short-season regions

2a 2b 3a 3b 4a 4b 5a 5b 6a 6b 7a 7b 8a

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Growth Stages

1

Germination & Seedling

10-14 days

Seeds sprout within 7-10 days; seedlings emerge with two cotyledons and quickly develop true leaves

Ensure consistent soil moisture without waterlogging. Thin seedlings to 4 inches apart once they have true leaves. Protect from birds if necessary.

2

Vegetative Growth

20-30 days

Plant develops multiple stems, branches, and compound leaves; compact growth habit reaching 24-28 inches

Water regularly to maintain even soil moisture. Apply 2-3 inches of mulch to retain moisture and regulate soil temperature. Monitor for weeds and remove early.

3

Flowering

10-15 days

Small white, pink, or lavender flowers appear in clusters along the stems and branches

Maintain consistent watering during this critical stage as flowers and pods develop. Avoid excessive nitrogen which can promote foliage over pod production. Continue weeding and mulch maintenance.

4

Pod Development

15-25 days

Flowers transition to small green pods that rapidly enlarge and fill with 2-3 beans per pod

This is the most water-critical stage; ensure 1-1.5 inches of moisture per week. Watch for pest damage. Do not over-fertilize as this delays maturity.

5

Harvest Maturity

Ready over a 7-14 day window

Pods become plump and full, remaining bright green; beans inside are fully sized and tender

Harvest when pods are full but still bright green and snap cleanly—do not wait for pods to yellow. Pick pods from the bottom of the plant upward. Harvest frequently to encourage continued production.

Companion Planting

Plan your garden →

Plant with:

corn squash pumpkin cucumber dill mint lettuce spinach

Avoid planting near:

fennel onions garlic cruciferous crops like cabbage or broccoli

Common Pests

  • Hand-pick in early morning; use row covers during peak beetle season; apply neem oil or insecticidal soap as needed

  • Spray with water to dislodge; use miticides or neem oil if infestation is severe; maintain adequate humidity

  • Pheromone traps for monitoring; organic insecticides; crop rotation to break pest cycle

  • Spray with strong water stream; use insecticidal soap; attract beneficial predators with companion plantings

  • Yellow sticky traps; neem oil or insecticidal soap; encourage natural predators

Uses

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Boiled & Salted Snack

Culinary

Boil pods in salted water for 5-7 minutes until tender, then squeeze beans directly into the mouth as a nutritious snack. This is the most traditional preparation in Japanese cuisine. [source]

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Salads & Bowl Additions

Culinary

Add blanched and cooled edamame to grain bowls, pasta salads, Asian noodle dishes, and mixed green salads for a protein boost and pleasant texture. [source]

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Soups & Stews

Culinary

Purée blanched edamame into creamy soups or add whole pods to vegetable stews and curries for nutritional depth and natural thickening. [source]

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Complete Protein Source

Medicinal

Edamame contains all nine essential amino acids, making it a complete plant-based protein ideal for vegetarian and vegan diets. Rich in fiber, vitamins, and minerals. [source]

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Sustainable Nitrogen Fixation

Household

As a legume, edamame fixes atmospheric nitrogen in the soil, naturally improving soil fertility for subsequent crops and reducing the need for chemical fertilizers. [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 pods when they are plump and still bright green, typically 65-75 days after planting. Pods should snap cleanly when bent and contain fully sized, tender beans. Harvest in the early morning for best flavor and texture. Pick from the bottom of the plant upward; frequent harvesting encourages continued pod production. Pods can be blanched and frozen immediately for long-term storage, or refrigerated for 3-5 days fresh.

Fun Facts

  • 🌱 Early Thunder was specifically bred to succeed in northern climates with short growing seasons, making it one of the earliest-maturing edamame varieties available—perfect for regions with 65-day summers.
  • 🌱 Edamame means 'beans on branches' in Japanese and has been cultivated in East Asia for over 2,000 years, yet it remains relatively new to North American gardens.
  • 🌱 Edamame can fix its own nitrogen from the air through a symbiotic relationship with soil bacteria, making it an excellent crop for improving soil health and reducing fertilizer needs in rotation systems.

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