Tennessee Sweet Potato

Family: Cucurbitaceae Vegetable

Warm, honeyed sweetness with a softly nutty finish—Tennessee Sweet Potato Cushaw Squash ripens to a long, elegant fruit that feels dense and velvety in the hand.

The flesh turns a rich, sunset-orange with a fine, creamy texture that shines when roasted, pureed for smooth sauces, or simmered into comforting preserves. Grow it for its statuesque presence in the garden and its dependable, late-season harvest at about 95 days.

Light: Full SunMaturity: 95 DaysHabit: Vine

Botanical illustration of Tennessee Sweet Potato

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	May 16th
Harvest Begins	Aug 19th
Harvest Ends	Oct 16th

Crop Details

Trait	Value
Days to Maturity	95
Sun Requirements	Full Sun
Growth Habit	Vine
Support Needed	Trellis
Planting Depth	Normal
Germination Temp (°F)	70
Min Soil Temp (°F)	65
Min Night Temp (°F)	55
Harden Off (days)	10

Culinary Notes

Chef's Note

This cushaw leans sweet and creamy—when you roast it hot, you get that caramel-sweet edge without turning stringy. Its velvety flesh behaves like a hybrid of sweet potato and winter squash, making it especially good for purées, custard pies, and thick spoonable sauces.

Best Uses

roasted wedges or cubes until the edges go bronzed and creamy
silky purées for soup, risotto-style texture, or mashed side dishes
butternut-style simmering into thick stews with browned aromatics
custardy pie filling or preserve-style spoonable jammy filling

Flavor Profile

warm honeyed sweetness velvety, fine-grain orange flesh softly nutty finish gentle squash aroma with a caramel edge when roasted

Kitchen Pairings

cinnamon brown butter sage ginger maple syrup smoked paprika

Frequently Asked Questions

What pest or disease problem is most common on Cucurbita argyrosperma, and how do I manage it?

For Cucurbita argyrosperma, powdery mildew and cucumber beetles are the most frequent issues in warm, humid weather. Start prevention early by spacing plants for airflow and watering at the soil line (not on leaves), and remove heavily infected leaves to slow spread. If beetles show up, use row cover until flowering and then hand-pick; you can also use an insect netting barrier during peak activity to protect blossoms and young foliage.

How often should I water Tennessee “Sweet Potato” vines during the main growing phase (fruit/seedling establishment through bulking)?

During active growth, keep the root zone evenly moist but never waterlogged—aim for about 1 inch (2.5 cm) of water per week, with extra during heat spells. Let the top 1–2 inches of soil dry slightly between waterings, since Cucurbita argyrosperma is sensitive to prolonged wet soil. Use drip irrigation or a slow-soak method so moisture reaches deep without wetting the foliage.

How can I tell when Cucurbita argyrosperma is ready to harvest?

Harvest at about 95 days when the gourds/squash are fully mature: the skin should be firm and hard, and the color pattern should be fully developed. The vines often begin to yellow and the fruit stem starts to dry; cut with a short stem attached rather than pulling. Cure harvested fruit in a warm, dry place with good airflow for about 7–14 days to improve keeping quality.