How to Grow Black Turtle Bush Bean
Phaseolus vulgaris 'Black Turtle'
Black Turtle Bush Bean is a popular warm-season heirloom variety prized for its tender pods and reliable performance in gardens across many zones. Gardeners value this easy-to-grow plant for its good disease resistance and ability to thrive in full sun once the soil warms up.
📷 Wikimedia CommonsStarting Black Turtle Bush Bean: indoors or direct sow?
🌾 Sow directly in the garden — Black Turtle Bush Bean is not usually started indoors.
Do not start seeds indoors; sow them directly into the garden only after all danger of frost has passed and soil temperatures are warm enough for germination.
Soil, care & harvest
Prepare your garden bed by amending the soil to reach a pH between 6.0 and 7.0, ensuring it is loose and well-draining. Since this is a warm-season crop sensitive to cold, wait until after the last spring frost when the ground has warmed sufficiently before sowing seeds directly outdoors. Plant seeds about one inch deep in rows spaced four to six inches apart. Expect germination within seven to ten days under these ideal conditions.
Space plants carefully according to their bush habit, maintaining a distance of four to six inches between them to encourage airflow. Provide support structures like trellises or stakes if the vines begin to climb excessively, though many varieties stay compact. Water consistently with about one inch per week, reducing frequency as pods mature to prevent splitting. Apply mulch around the base to retain moisture and suppress weeds while feeding lightly if growth seems slow.
Watch for Mexican bean beetles, aphids, and bean leaf beetles; hand-pick them or use insecticidal soap early in the season. Monitor for anthracnose, bacterial blight, and white mold by ensuring good air circulation and avoiding overhead watering when possible. Harvest pods when they are tender and glossy, typically ninety to one hundred days after sowing, before they become tough or stringy.
When to Plant Black Turtle Bush Bean
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
| Zone | Start Indoors | Direct Sow | Harvest |
|---|---|---|---|
| Zone 1 | — | July – August | November – August |
| Zone 2 | — | June – August | October – September |
| Zone 3 | — | June – July | October |
| Zone 4 | — | June – July | September – October |
| Zone 5 | — | May – June | September – October |
| Zone 6 | — | May – June | September – October |
| Zone 7 | — | April – June | August – October |
| Zone 8 | — | April – May | August – September |
| Zone 9 | — | March – April | July – August |
| Zone 10 | — | February – April | June – August |
| Zone 11 | — | January – March | May – July |
| Zone 12 | — | January – March | May – July |
| Zone 13 | — | January – March | May – July |
Companion Plants for Black Turtle Bush Bean
✓ Good companions
Beans fix nitrogen which carrots need, carrots don't compete for same soil space
Provides natural support structure for climbing beans in Three Sisters planting
Both benefit from similar growing conditions and beans provide nitrogen
Repels Mexican bean beetles and nematodes, attracts beneficial insects
Acts as trap crop for aphids and cucumber beetles, repels bean beetles
Break up soil for bean roots, mature quickly before beans need full space
Repels bean beetles and other pests with strong aromatic oils
Ground cover reduces weeds, part of traditional Three Sisters companion planting
✗ Keep away from
Allelopathic compounds can stunt bean growth and reduce yields
Can inhibit bean growth and nitrogen fixation by soil bacteria
Competes heavily for nutrients and water, can shade out beans
Nutrition Facts
Per 100g serving (USDA FoodData Central)
