← Plant Guides

How to Grow Adzuki Bean (Adzukigasumi variety)

Adzuki Bean (Adzukigasumi variety)

Vigna angularis

vegetable

Adzukigasumi is a Japanese heirloom variety of adzuki bean (also called red mung bean), prized for its small, deep red beans with a distinctive white hilum. This bushy annual legume produces nutritious, protein-rich beans traditionally used in Asian cuisine, particularly for making red bean paste and sweet desserts. The plant fixes nitrogen in soil, making it an excellent rotational crop for sustainable gardening.

Looking for a specific variety?

Adzukigasumi Takara Hakusengan Seirei Yoshida Imidori

When should you plant Adzuki Bean (Adzukigasumi variety) 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.

Get my Adzuki Bean (Adzukigasumi variety) timeline →

Example Adzuki Bean (Adzukigasumi variety) timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Adzuki Bean (Adzukigasumi variety)

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. Harvest Adzuki Bean (Adzukigasumi variety)

    Around Jul 16

    ≈ 90 days after planting

Sample dates for Pittsburgh, PA. Sign up to get exact Adzuki Bean (Adzukigasumi variety) dates for your own zip code.

Growing Conditions

☀️
Sun: Full sun, 6-8 hours daily minimum; 8+ hours preferred for maximum yields
💧
Water: Moderate, consistent moisture during growing season; 1-1.5 inches per week including rainfall. Reduce watering after flowering to encourage bean development. Avoid waterlogging.
📏
Spacing: 4-6 inches apart in rows 12-18 inches apart inches
📅
Days to maturity: 90-120 days from planting to harvest
🌱
Planting depth: 0.75-1.25 inches deep

Soil

Type: Well-draining loamy to sandy loam soil
pH: 6.0-7.0
Amendments:
Compost or aged manure for organic matter Avoid excessive nitrogen (legume fixer) Add potassium and phosphorus if soil test indicates deficiency

Growing Zones

Find your zone →

Zones 6-9; can grow in zone 5b with season extension, prefers warm conditions

5b 6a 6b 7a 7b 8a 8b 9a 9b 10a

Sign up free to see if Adzuki Bean (Adzukigasumi variety) grows in your zone — and get a personalized planting timeline.

Get my Adzuki Bean (Adzukigasumi variety) timeline →

Growth Stages

1

Germination & Emergence

7-14 days

Seeds sprout and seedlings emerge with cotyledons visible. First true leaves develop within 7-10 days.

Ensure soil stays consistently moist but not waterlogged. Maintain soil temperature of 65-70°F minimum for germination. Thin overcrowded seedlings.

2

Vegetative Growth

30-45 days

Plant develops compound leaves and bushy structure, 12-24 inches tall. Stems become woody and branching increases.

Provide consistent watering and monitor for weeds. Avoid high-nitrogen fertilizers which promote foliage over beans. Support taller varieties with stakes if needed.

3

Flowering

20-30 days

Small yellow or pale purple flowers appear in clusters at leaf axils. Flowering progresses from lower to upper nodes.

Maintain steady watering during this critical stage. Reduce nitrogen input. Watch for pests like spider mites and thrips. Flowers self-pollinate readily.

4

Pod Development & Maturation

30-40 days

Flowers give way to small, narrow green pods that elongate. Pods gradually fill with beans and turn dark brown to reddish-brown when mature.

Water moderately but allow soil to dry slightly between waterings to encourage pod maturation. Reduce watering frequency in final 2-3 weeks. Watch for bean weevils.

5

Harvest & Cure

2-3 weeks post-maturity

Pods become brittle and rattle when shaken; beans inside are hard and fully colored. Plants may yellow and leaves drop.

Allow pods to dry fully on the plant before harvesting if weather permits. If frost threatens, harvest early and cure indoors in a warm, dry location for 2-3 weeks.

Companion Planting

Plan your garden →

Plant with:

Corn Squash Cucumber Pumpkin Melon Onion Garlic Lettuce Spinach

Avoid planting near:

Fennel Alliums (excessive amounts) Other nitrogen-fixing legumes in same location (crop rotation best)

Common Pests

  • Remove and destroy infested pods; use row covers during flowering; store dried beans in sealed containers with diatomaceous earth

  • Spray neem oil or insecticidal soap; increase humidity with overhead watering; remove heavily infested leaves

  • Use reflective mulches to deter; spray neem oil; encourage beneficial insects

  • Use row covers on young plants; hand-pick; apply neem oil if infestation is severe

  • Remove by hand; use row covers early season; spray neem oil if needed

Uses

🍳

Red bean paste & sweet desserts

Culinary

Adzuki beans are a staple in East Asian cuisine, traditionally cooked and pureed into red bean paste used in mooncakes, ice cream, pastries, and other sweets. The mild, slightly sweet flavor makes them ideal for both savory and dessert applications. [source]

🍳

Soups & stews

Culinary

Cooked adzuki beans are commonly used in traditional Asian soups and one-pot dishes. Their small size and relatively quick cooking time (compared to other beans) make them practical for weeknight meals. [source]

💊

Traditional medicine & nutrition

Medicinal

Adzuki beans are rich in protein, fiber, vitamins, and minerals. In traditional Chinese and Ayurvedic medicine, they are valued for supporting kidney health, digestion, and overall wellness. Modern nutritional analysis confirms high antioxidant content. [source]

🏠

Sprouting seeds

Household

Adzuki bean sprouts are nutritious, crunchy additions to salads and stir-fries. They sprout quickly (3-5 days) and are easy to grow on a windowsill using a jar method, providing fresh vegetables year-round. [source]

🦋

Nitrogen fixation & soil improvement

Wildlife

As a legume, adzuki beans form symbiotic relationships with nitrogen-fixing bacteria in the soil, naturally enriching the soil and reducing the need for synthetic nitrogen fertilizers. This makes them excellent for crop rotation and sustainable farming. [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 when pods are fully dry and brown (usually 100-120 days after planting). Pods should rattle when shaken. For commercial drying, allow pods to cure on plants until brittle if weather cooperates. In humid climates, pull plants and hang them upside-down in a dry location. Shell beans by hand or use a bean thresher. Store dried beans in cool, dry conditions in airtight containers.

Fun Facts

  • 🌱 Adzukigasumi is a Japanese heirloom variety whose name reflects its cultural importance in Japanese and broader East Asian cuisine, where adzuki beans have been cultivated for thousands of years.
  • 🌱 A single adzuki plant can produce 20-50 mature pods, each containing 5-10 beans, making them a prolific and rewarding crop for home gardeners with limited space.
  • 🌱 Adzuki beans are among the fastest-cooking dried beans, requiring only 30-45 minutes of simmering without pre-soaking, making them more convenient than larger bean varieties.

Gardening Terms

New to gardening? Learn about terms used in this guide:

Annual Full Sun Germination Heirloom True Leaves
Shop Adzuki Bean (Adzukigasumi variety) plants and related plants at Plant Addicts →

Join 30,000 gardeners planning their gardens with LizPlants.

Get your personalized Adzuki Bean (Adzukigasumi variety) planting timeline

Tell us your zip code and we'll calculate exactly when to start Adzuki Bean (Adzukigasumi variety) 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 Adzuki Bean (Adzukigasumi variety) timeline →