Bean Growing Guide

Bean Growing Guide - Grow Organic

Introduction

Beans are a staple vegetable for home gardens, offering a versatile and nutritious harvest. Whether you choose snap, shelling, or dry beans, understanding their growth habits and proper care techniques can ensure a successful and abundant crop.

Click here to access the complete Bean Growing Guide (PDF) for detailed information on soil preparation, planting, and long-term care.

Types of Beans and Their Growth Habits

• Bush Beans: Compact, early producers that don’t require support. Plant every 2 weeks for continuous harvest.
• Pole Beans: Indeterminate climbers that need a trellis and produce beans over a longer period.
• Runner Beans: Ancestors of modern pole beans, thriving in cooler climates.
• Snap Beans: Eaten with the pod while young and tender.
• Shell Beans: Harvested for the seeds inside the pod, such as soybeans and lima beans.
• Dried Beans: Stored after pods fully mature and dry on the plant.
• Yard Long Beans: Subtropical Asian varieties, best grown in hot climates.
• Half-Runner Beans: A blend of bush and pole bean traits, shorter vines but higher yields.

Best Growing Conditions for Beans

Soil and Temperature:

• Soil pH: 6.5
• Germination Temperature: 60°F minimum
• Optimal Growth Temperature: 70–80°F

Companion Planting:

• Good Companions: Carrots, cucumbers, cabbage, peas, rosemary, and parsley.
• Avoid Planting Near: Basil, kohlrabi, onions, and fennel.

Watering and Fertilization:

• Watering: Maintain consistent moisture using drip irrigation and mulch. Avoid overhead watering to reduce disease risk.
• Fertilization: Use a low-nitrogen fertilizer. Excess nitrogen promotes leaves over pods.

How to Plant and Grow Beans

Seed Sowing:

• When to Plant: Sow directly outdoors after the last frost when the soil reaches at least 60°F.
• Bush Beans: Plant every 2 weeks for a continuous harvest. Space seeds 2–4 inches apart in rows 18–24 inches apart.
• Pole Beans: Use a trellis or teepee support. Plant seeds 4–6 inches apart in a circle around supports spaced 6–8 inches from the poles.
• Inoculation: Coat seeds with a nitrogen-fixing Rhizobium bacteria inoculant to improve yields.

Growing and Maintenance:

• Support: Provide trellises for pole beans. Minimum height should be 6 feet, supported by stakes or Hortonova trellises.
• Mulching: Retain soil moisture and suppress weeds.
• Pest Prevention: Ensure proper spacing for good air circulation to reduce disease risks.

Harvesting Beans

Snap Beans:

• When to Pick: Harvest when pods are firm and snap easily, with small seeds inside.
• Storage: Keep in an airtight container in the refrigerator. Best eaten within 4 days of harvest.

Shell Beans:

• When to Pick: When seeds inside the pods are fully formed but not dried.

Dried Beans:

• When to Pick: Once pods dry on the plant and beans rattle inside. If rain threatens, pull the entire plant and hang indoors to finish drying. Store dried beans in airtight containers in a cool, dark place.

Common Bean Pests and Diseases

Pests:

• Aphids: Colonize leaves and stems. Use yellow sticky traps or introduce beneficial insects like ladybugs.
• Cutworms: Protect seedlings with foil collars around stems.
• Mexican Bean Beetles: Handpick beetles or use organic insecticides.
• Spider Mites: Wash off with a strong water spray or apply organic insecticides.
• Corn Earworms: Use traps and beneficial insects for control.

Diseases:

• Blight: Causes brown spots on leaves and pods. Prevent with proper spacing and reduce humidity.
• Leaf Spot: Appears as irregular brown lesions. Use organic fungicides.
• Mosaic Virus: Causes mottled leaves and stunted growth. Control aphids to prevent spread.
• Blossom Drop: Results from high heat or excess nitrogen.

Pest Control Using Integrated Pest Management (IPM)

• Cultural Controls: Rotate crops annually, remove plant debris after harvest, and use row covers like Agribon AG15 to prevent pest invasions.
• Biological Controls: Introduce beneficial insects such as green lacewings and ladybugs.
• Organic Treatments: Use approved insecticides for specific pests and apply organic fungicides for diseases.

Why Grow Beans?

• Nitrogen-Fixing: Improves soil fertility for future crops.
• High Yield: Produces abundant harvests, especially with proper succession planting.
• Variety: Numerous types suitable for different tastes and growing conditions.
• Long-Term Storage: Dried beans can be stored for over a year.

FAQs About Bean Growing

When is the best time to plant beans?
Beans should be planted outdoors after the last frost when soil temperatures reach at least 60°F (16°C). Bean seeds germinate poorly in cold soil and may rot if planted too early. Most gardeners sow beans directly into the garden because the plants do not transplant well. Warm soil and consistent moisture help seeds germinate quickly and establish strong seedlings.
What is the difference between bush beans and pole beans?
Bush beans grow as compact plants that typically reach 1–2 feet tall and do not require support. They produce their crop over a relatively short period, which makes them ideal for succession planting. Pole beans, on the other hand, are climbing vines that can grow 6–10 feet or more and need a trellis, stake, or teepee structure. Pole beans usually produce over a longer period, allowing gardeners to harvest beans continuously throughout the season.
Why are my bean plants producing lots of leaves but few pods?
Bean plants that produce abundant foliage but few pods are often receiving too much nitrogen fertilizer. Excess nitrogen encourages leafy growth instead of flowering and pod production. Beans are legumes and naturally fix nitrogen in the soil with the help of beneficial bacteria, so they typically require low-nitrogen fertilizers and balanced soil conditions to produce a healthy crop.
How often should bean plants be watered?
Bean plants require consistent soil moisture, especially during flowering and pod development. Most gardens benefit from about 1 inch of water per week, either from rainfall or irrigation. Watering at the base of the plant rather than overhead helps reduce the risk of fungal diseases. Mulching around the plants can also help conserve moisture and keep soil temperatures stable.
When should beans be harvested?
The harvest time depends on the type of bean being grown. Snap beans should be picked when the pods are firm, crisp, and still tender, before the seeds inside become large. Shell beans are harvested when the seeds inside the pod are fully formed but still soft. Dried beans should remain on the plant until the pods dry out and the beans inside rattle, after which they can be stored in airtight containers in a cool, dry place.

Bean Growing Resource Area

Expand your bean-growing knowledge with these expert guides covering varieties, harvesting, companion planting, and climate-resilient techniques.

Bean Types & Variety Guides

Growing Techniques & Garden Planning

Harvesting & Crop Care

Climate-Smart Gardening

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