Black Turtle

Family: Fabaceae Vegetable

Sink your spoon into the velvety, inky allure of Black Turtle beans—each seed holds a rich, near-black sheen with a pleasantly firm bite and a subtly earthy, savory depth.

As the season unfolds to about 100 days, plants build sturdy, productive pods that mature into dependable, uniform harvests for home gardeners who love dependable results. Black Turtle shines for hearty pot-style favorites, robust purées, and deeply flavored sauces, and it also makes a striking addition to bean-forward salads and pickled preparations.

Light: Full SunMaturity: 100 DaysHabit: Bush

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Direct Sow
Last Frost	Apr 25th
Transplant / Sow Outdoors	Apr 25th
Harvest Begins	Aug 3rd
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	100
Sun Requirements	Full Sun
Growth Habit	Bush
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Black Turtle is built for the long simmer: it stays pleasantly firm while developing an inky, savory mouthfeel that turns glossy as starches emulsify. Cook it down in a sauce or purée it—its texture keeps a satisfying chew that doesn’t collapse into paste.

Best Uses

slow-braised bean pot with aromatics until the sauce turns silky
thick purée or mash that clings to the spoon (and bread) without going grainy
smoky, saucy chili or ragù-style bean base
bean salads or warm grain bowls where the beans need to stay intact

Flavor Profile

earthy, savory depth near-black, meaty bean richness pleasant firmness (holds its shape) mildly sweet, creamy finish when cooked through

Kitchen Pairings

onion garlic smoked paprika bay leaf vinegar (sherry or red wine) olive oil

Frequently Asked Questions

Why are my Black Turtle beans turning leaves yellow and getting a fuzzy gray mold at the soil line?

This is often gray mold (Botrytis) or another fungal problem triggered by cool, damp conditions and poor airflow. Remove and discard the worst affected leaves, then water only at the base (no leaf wetting) and increase spacing so plants dry quickly. If the problem is spreading, start a labeled fungicide for edible beans and apply early, following the label timing and safety intervals.

How often should I water Black Turtle beans during the main growing phase (after plants emerge)?

From emergence through pod fill, keep the soil consistently moist but not soggy—aim for about 1 inch of water per week, increasing to more during heat. Water when the top 1 inch of soil feels dry, and avoid daily shallow watering that keeps the surface wet and promotes disease. At the start of flowering and while pods are forming, don’t let them dry out fully, or you’ll get poor pod set.

How can I tell when Black Turtle beans are ready to harvest?

Harvest for dry beans when the pods are fully filled, dry, and brittle, and the seeds rattle inside the pod—this is usually around 100 days from sowing. For fresh snap beans, pick earlier when pods are tender and seeds are still small and creamy. Either way, harvest on a dry day and let dry pods finish curing in a warm, airy spot if they still feel leathery.