Green beans are an excellent addition to any Missouri garden, as they are easy to grow, highly productive, and provide a great source of fresh vegetables. Here’s what you need to know about growing them successfully in Zone 6b-7a.
1. Choosing the Right Variety
There are two main types of green beans:
- Bush Beans – Compact plants that don’t require support and mature quickly (50-60 days). Ideal for smaller spaces or raised beds.
- Pole Beans – Vining plants that require a trellis but produce continuously over a longer period (60-70 days). Great for maximizing space through vertical gardening.
2. Planting Green Beans
- When to Plant: Direct sow seeds after the last frost when soil temperatures reach at least 55-60°F (mid-to-late April in Missouri). Successive plantings every 2-3 weeks will extend the harvest.
- Where to Plant: Choose a sunny location (6+ hours of direct sunlight). Well-draining soil with organic matter is best. Avoid planting in areas where beans or legumes grew the previous year to prevent disease.
- Spacing:
- Bush Beans: 2-3 inches apart, rows 18-24 inches apart
- Pole Beans: 4-6 inches apart, rows 30-36 inches apart, with trellises or poles for support
3. Companion Planting for Green Beans
Green beans grow well with:
✔ Corn – Beans use the corn stalks as natural trellises
✔ Cucumbers – Similar watering needs and mutual growth benefits
✔ Marigolds & Nasturtiums – Repel bean beetles
✔ Radishes & Carrots – Help deter pests
Avoid planting with:
✘ Onions & Garlic – They inhibit bean growth
4. Watering & Fertilization
- Watering: Keep soil consistently moist but not waterlogged. Water deeply 1-1.5 inches per week, preferably in the morning.
- Mulching: Applying mulch helps retain moisture and suppress weeds.
- Fertilizing: Beans don’t need heavy fertilization since they fix nitrogen in the soil. However, if needed, use a low-nitrogen fertilizer (like 5-10-10) at planting time.
5. Pests & Disease Prevention
- Common Pests:
- Mexican Bean Beetles – Handpick or use neem oil
- Aphids – Spray with a mild soap solution
- Spider Mites – Increase humidity and hose down plants
- Diseases:
- Rotate crops each year to prevent fungal infections
- Avoid overhead watering to reduce risk of rust and blight
6. Harvesting Green Beans
- Bush Beans: Ready in 50-60 days; harvest every few days to encourage continued production.
- Pole Beans: Start picking around 60-70 days; keep harvesting to promote more flowers and beans.
- Pick beans when they are firm, crisp, and about 4-6 inches long before the seeds bulge inside the pod.
7. Extending the Growing Season
- Succession Planting: Stagger plantings every 2-3 weeks from mid-April to mid-July for a continuous harvest.
- Fall Crop: Beans can be planted again in late July to early August for a fall harvest before the first frost.
