Why Beans Prefer Lean Soil: pH 6.5, Minimal Amendments, and Stress for Better Yields

Gardener asks whether to use potting soil or plant-specific soil (e.g., acidic for azaleas) for beans.

Beans Want

• pH ~6.5.
• Poor to moderate fertility—rich soil makes huge plants, few beans.
• Loosened soil with only 10–20% compost, chopped leaves, or fine pine bark.

Stress the plant slightly for better production.