Black Coat

Family: Fabaceae Legume

Velvety, inky pods drape from vigorous poles like satin ribbons—Black Coat delivers a deep, almost black-green sheen that turns especially striking in the garden light.

Tender yet substantial, the pods hold their shape with a crisp snap and a pleasantly sweet, bean-forward flavor. Grow Black Coat for abundant harvests suited to fresh pod enjoyment and for showcasing in vibrant pod-forward dishes, from quick sautés to hearty, sauce-ready servings.

Light: Full SunMaturity: 90 DaysHabit: Clumping

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	Jul 24th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	90
Sun Requirements	Full Sun
Growth Habit	Clumping
Support Needed	Trellis
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 Coat’s pods are tender but still reliably crisp, so they’re built for fast heat where they stay ribbon-like instead of turning soft. Use them where their near-black color and sweet, vegetal snap can show off—finished with acid and fat to make the flavor pop.

Best Uses

quick sauté in olive oil with garlic and a squeeze of lemon—keep them crisp
stir-fry with high heat so they blister without going stringy
blanch-and-chill for snappy green-bean salad with a tangy vinaigrette
toss into a thickened pan sauce (butter-wine or tomato-braised) for glossy pod-ready sides

Flavor Profile

inky-sweet, bean-forward flavor tender yet crisp snap slight grassy freshness with a silky pod finish

Kitchen Pairings

garlic lemon olive oil butter tomato parmesan

Frequently Asked Questions

What’s the most common pest or disease problem for Phaseolus coccineus (runner bean), and how can I treat it?

Runner beans (Phaseolus coccineus) commonly suffer from fungal leaf spot/anthracnose, especially when foliage stays wet. Remove and dispose of badly spotted leaves, water at the soil line instead of overhead, and increase airflow by spacing plants for full sun exposure. If it’s spreading, use a labeled copper-based fungicide and reapply according to the label after rain or heavy dew.

How often should I water runner beans during peak growth (when plants are flowering and setting pods)?

During flowering and pod fill (roughly mid-season through the 90-day maturity window), keep soil evenly moist but not waterlogged—about 1 inch (2.5 cm) per week, adjusted for heat and rainfall. Water deeply 1–2 times per week so moisture reaches the root zone, then let the top 1 inch of soil dry slightly between waterings to prevent root stress and disease.

How do I know when Phaseolus coccineus ‘Black Coat’ runner beans are ready to harvest?

Harvest when pods are fully formed but still tender—typically when they snap easily and the seeds inside are not bulking up hard. Look for pods that are long and glossy for the variety, usually starting around 70–90 days after sowing, and pick regularly to keep plants producing.