Stokes Purple

Family: Convolvulaceae Root Vegetable

Velvety, inky purple flesh with a bright, almost jewel-toned glow is the signature of Stokes Purple—an heirloom-minded vine that rewards patience with roots that feel richly dense and beautifully smooth.

When grown to maturity, the tubers develop a deep purple exterior and a striking purple interior, delivering a sweet, earthy flavor profile prized for roasting and for show-stopping color in mashes, purées, and vibrant sauces. Plant Stokes Purple for a season-long harvest of dramatic color and satisfying texture that turns everyday dishes into a garden centerpiece.

Light: Full SunMaturity: 110 DaysHabit: Vine

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 13th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	110
Sun Requirements	Full Sun
Growth Habit	Vine
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	75
Min Soil Temp (°F)	70
Min Night Temp (°F)	55
Harden Off (days)	Not Required

Culinary Notes

Chef's Note

Stokes Purple cooks up with a dense, creamy mouthfeel that doesn’t turn watery, and its color stays gorgeous when you purée it and reduce it slightly. Roast first for caramel edges, then lean on fat plus a bright hit of citrus to make the sweetness snap.

Best Uses

roasted wedges or batons, finished with flaky salt and a little acid
silky mash or purée—no lumps, holds color under butter/cream
vibrant sauces (purée-thickened) where you want purple to stay vivid
gnocchi-style mash dough or dumplings for a dramatic, starchy chew

Flavor Profile

sweet, earthy tuber sweetness inky-purple, subtle cocoa-like savoriness velvety, smooth interior with dense bite roasting brings out caramel edges and keeps the flesh moist

Kitchen Pairings

brown butter lime juice coconut milk smoked paprika black pepper goat cheese

Frequently Asked Questions

What pest or disease commonly affects Ipomoea batatas (sweet potato), and how can I manage it?

Sweet potatoes are especially prone to sweet potato weevils and fungal problems like root rot when soil stays too wet. Check plants regularly for feeding damage and burrows near the crown and storage roots, and remove heavily infested plants; use healthy slips/seed roots only. Prevent rot by improving drainage and avoiding overhead watering during humid spells, and harvest promptly when mature to reduce disease in storage.

How often should I water Ipomoea batatas during the main growing phase?

During active vine growth and early root bulking, keep soil consistently moist but never waterlogged—aim for top 1–2 in (2–5 cm) drying slightly between waterings. As roots expand, water deeply once or twice per week depending on heat and rainfall, reducing frequency if the soil remains damp. If leaves wilt during the day but recover at night, increase water slightly; if soil is soggy, cut back immediately to prevent rot.

How do I know when Ipomoea batatas ‘Stokes Purple’ is ready to harvest?

Harvest around 110 days from planting (or when vines begin to yellow naturally), before cool weather sets in. Confirm readiness by gently digging near the plant to check that storage roots have filled out and have a firm skin. After lifting, cure the roots in warm, humid conditions for about a week to improve sweetness and heal minor cuts before long storage.