Murasaki-29

Family: Convolvulaceae Root Vegetable

Slip your spoon into Murasaki-29 and you’ll meet a velvety, richly colored purple flesh that glows from deep violet to near ink-blue at the center.

Roasted until tender, it turns creamy and sweet with a smooth, spoonable texture—ideal for vibrant purées, striking wedges, and vivid sauces that keep their color beautifully. A home-garden favorite for its dependable 90-day rhythm and showstopping, market-class purple roots that look as good as they taste.

Light: Full SunMaturity: 90 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	Jul 24th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	90
Sun Requirements	Full Sun
Growth Habit	Vine
Support Needed	None
Planting Depth	Normal
Germination Temp (°F)	80
Min Soil Temp (°F)	65
Min Night Temp (°F)	55
Harden Off (days)	10

Culinary Notes

Chef's Note

Murasaki-29 cooks down into a dense, creamy mash with real sweetness and earthy ballast, so it doesn’t need heavy masking—just fat and a bright acid to sharpen the finish. Roast it until it’s fully yielding, then purée or mash; the purple color is most theatrical when you keep the texture smooth and the sauce thick enough to cling.

Best Uses

roasted wedges that mash easily into a silky side
vivid purée (with butter or olive oil) that stays smooth
thick, colored pies or savory custards for striking cross-sections
sweet potato gnocchi or dumplings where the starch helps them stay tender

Flavor Profile

creamy, spoonable sweetness earthy rootiness with a gentle nutty edge deep violet color that holds under heat soft, velvety texture once roasted

Kitchen Pairings

brown butter lime juice coconut milk chili powder black pepper maple syrup

Frequently Asked Questions

What’s the most common pest or disease on Ipomoea batatas (murasaki sweet potato) and what should I do if I see it?

Watch for sweet potato weevil and their feeding damage, which often shows up as tunnels in the storage roots and ragged holes near soil level. Keep the beds free of volunteer sweet potatoes, use healthy slips only, and remove any heavily damaged roots promptly at harvest; if you see wilting patches, dig up and discard infested plants rather than replanting in the same spot. For fungal leaf issues (like alternaria/leaf spot), remove affected leaves and avoid wetting foliage during watering, since warm, humid leaf wetness speeds spread.

How often should I water Ipomoea batatas during the main growth phase (after slips are established)?

After slips take hold, water deeply about 1–2 times per week, keeping the bed evenly moist but not soggy. Aim for soil that feels like a wrung-out sponge 2–3 inches down; if water pools or the surface stays wet, cut back because sweet potatoes rot in overly wet soil. Once roots start bulking (about mid-season), reduce frequency slightly and water only when the top few inches begin to dry.

How can I tell when my Ipomoea batatas is ready to harvest?

Harvest when the vines have largely yellowed and you’re approaching about 90 days from planting slips, especially if nights are cooling. Check one plant by gently digging; mature sweet potatoes will have a firm skin that doesn’t rub off easily with light handling. After curing for 7–10 days in warm, humid conditions, the flavor will sweeten and the skins will set for storage.