Cosse Violette

Family: Fabaceae Vegetable

Plump, violet-tinged pods unfurl with a velvety snap and a distinctly sweet, garden-fresh flavor that lingers like a cool berry note.

Cosse Violette’s climbing vigor rewards steady picking with tender, stringless beans that stay crisp and beautifully colored—ideal for showcasing in vibrant platters and for turning into richly hued preserves and relishes. Grow it on a sturdy trellis for a long harvest window and a showy, ornamental sweep of color through the season.

Light: Full SunMaturity: 60 DaysHabit: Clumping

Botanical illustration of Cosse Violette

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	Jun 24th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	60
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

Cosse Violette pods are all about that crisp, velvety snap and a faint berry-cool finish—so cook fast and keep them bright. Use lemon and vinegar to sharpen the sweetness, and avoid long stews where they’ll lose their clean crunch.

Best Uses

short-blanch and shock for vibrant chilled platters
quick-sauté with browned butter and garlic to keep the snap
pickled “purple” beans for tangy crunch and color
fold into relishes or warm salads where the pods stay bitey

Flavor Profile

sweet, garden-fresh bean flavor cool berry-like note on the finish velvety snap with a crisp, tender bite stringless, cleanly edible texture

Kitchen Pairings

garlic lemon browned butter shallot parmesan vinegar

Frequently Asked Questions

How do I manage powdery mildew or rust on Phaseolus vulgaris (pole beans) like Cosse Violette?

Watch for powdery white spots or rust-colored specks on leaves, which spread fast in humid, crowded bean plantings. Improve airflow by tying vines to poles and spacing plants so leaves don’t overlap; water at the base early in the day to keep foliage dry. If symptoms start, remove the worst leaves and apply a labeled fungicide for beans according to the product directions.

How often should I water Cosse Violette pole beans during the main growing phase (after flowering begins)?

Water deeply about 1–2 times per week, aiming for evenly moist soil; pole beans need consistent moisture once they start flowering and setting pods. Check soil 1–2 inches down—if it’s starting to dry out, soak thoroughly until the root zone is wet, but avoid waterlogged soil that can cause poor growth.

How can I tell when Cosse Violette pole beans are ready to harvest?

Harvest when pods are fully formed but still tender—typically around 55–65 days from sowing, aligning with your ~60-day maturity. For best flavor, pick pods when they’re about pencil-thick and before seeds bulge; check every 1–2 days once pods start setting, because beans can go from tender to tough quickly.