Sucrine Du Berry Squash: Growing the Rare French Heirloom in Kansas

Sucrine du Berry is not a common name in American seed catalogs, and that is exactly the point. This elongated French heirloom has been grown in the Berry region of central France for generations, slipping quietly toward obscurity before Slow Food added it to their Ark of Taste. Growing it in Kansas feels like a small act of preservation and a generous reward for doing so.

This is a Cucurbita moschata variety, which means it carries the same natural resistance to squash vine borers that makes the Seminole and Tahitian Melon so reliable in the Midwest. In a garden that has been hit by vine borers year after year, Sucrine du Berry offers a practical path forward.

What You Are Growing

The vines are large and sprawling, as most moschata varieties are. They will run 10 to 15 feet across the garden if left unchecked. Each vine produces 5 to 8 fruits over the season, and each fruit weighs between 2 and 6 pounds when fully developed.

The shape is distinctive: elongated and pear-like, slightly curved at the neck, reminiscent of a Violina Rugosa but more deeply ridged. Young fruits are dark green with lighter striping. As they approach maturity and move through curing, the skin shifts toward a warm ochre or pale orange-tan.

The flesh inside is dense, deeply orange, and markedly sweeter than a standard butternut. French cooks have traditionally used it in soups, gratins, and jams. It roasts beautifully and has a richness that holds up to long, slow cooking. Storage runs 4 to 6 months in a cool, dry place.

When to Plant in Kansas

In Kansas Zone 6b, the last frost typically falls between April 15 and May 1. Sucrine du Berry needs 100 days to maturity, so timing your planting matters.

For transplants: start seeds indoors 3 to 4 weeks before your last frost date. That means mid-to-late March for most of Kansas. Use individual 3-inch or 4-inch pots. Squash dislikes having its roots disturbed, so avoid transplanting from small cell trays where roots become entangled.

For direct sowing: wait until soil temperature consistently reaches 70 degrees Fahrenheit, usually mid-May in central Kansas. Seeds germinate in 5 to 10 days at 70 to 95 degrees soil temperature. Cooler soil slows germination and increases rot risk.

Soil and Site

Sucrine du Berry performs best in rich, well-drained soil with a pH between 6.0 and 7.0. It rewards compost heavily worked into the planting area. This is a large vine and a long-season crop, so giving it good soil upfront pays off at harvest.

Full sun is essential. Six hours minimum, eight or more is ideal. Kansas summers are hot and this variety handles that heat well, partly because of its moschata genetics, which were shaped by subtropical growing conditions over centuries.

Good air circulation between vines reduces powdery mildew pressure in late summer. If you are growing in a tight space, consider a trellis. Sucrine du Berry fruits are smaller than Tahitian Melon, and the plants can be trained upward with some support under the developing fruits.

Planting and Spacing

Space transplants or direct-seeded hills 4 to 6 feet apart in rows 6 to 8 feet apart. If you are growing on a trellis, 3 to 4 feet between plants is workable. The vines will find their way.

Plant seeds 1 inch deep, two to three seeds per hill, thinning to one plant per hill once seedlings establish. Transplants should go in at the same depth they grew in their containers.

Water deeply at planting to settle roots. Keep soil consistently moist for the first two weeks.

Watering and Feeding

Squash is thirsty during vine development and fruit set, and more drought-tolerant once fruits are sizing up. A good rule: 1 inch of water per week during the growing season, applied at the base of the plant rather than overhead. Wet foliage invites disease.

A side-dressing of compost or a balanced fertilizer applied when vines begin to run helps support fruit development. Heavy fruit load takes real energy from the plant. Feed it and it will deliver.

Vine Borer Resistance

As a Cucurbita moschata, Sucrine du Berry is highly resistant to squash vine borers. The moschata species produces a thicker, harder stem that the vine borer moth avoids when laying eggs. This is not immunity, but it is a significant advantage over Cucurbita pepo varieties like zucchini and most carving pumpkins.

In Zone 6b Kansas, vine borer moths typically fly from late June through early August. Planting a late-season moschata crop, or succession planting after the first borer flight, can sidestep the worst pressure entirely. For more detail, see our vine borer identification and prevention guide.

Harvest and Curing

Sucrine du Berry is ready when the skin turns ochre or pale orange-tan and has become hard enough that a fingernail will not penetrate it easily. The stem connecting the fruit to the vine will begin to dry and cork over. Do not rush this. An under-cured Sucrine will not store as long.

After harvest, cure in a warm location with good airflow for 10 to 14 days. A covered porch or a shaded outbuilding works well. Once cured, move to a cool, dry space. These will keep 4 to 6 months in the right conditions.

Saving Seeds

Sucrine du Berry is an open-pollinated heirloom, which means you can save seeds and grow true-to-type plants the following year. As a moschata, it can cross with other moschata varieties if they are grown nearby and flowering at the same time. If seed purity matters to you, grow only one moschata variety per season, or hand-pollinate and cover the flowers.

Let seed-saving fruits stay on the vine as long as possible before frost. The seeds continue maturing inside the fruit even after the vine is struggling. Harvest, scoop, rinse, and dry seeds fully before storing in a cool, dark, dry location.

Common Issues

Powdery mildew appears on the leaves in late summer, especially when nights cool and days stay warm. It rarely kills the plant but can accelerate senescence. Adequate plant spacing and avoiding overhead watering keeps it in check. The fruits are not affected even if foliage looks rough by September.

Cucumber beetles can be a nuisance early in the season. Row cover over young transplants helps. Remove the cover when flowering begins to allow pollination.

Related Varieties Worth Growing

If Sucrine du Berry appeals to you, consider pairing it with other moschata heirlooms that share similar cultural requirements and the same vine borer resistance. Violina Rugosa Butternut is similar in shape and culture, with outstanding storage quality. Musquee de Provence is another French heirloom, ribbed and large, with deeply orange flesh prized for cooking.

Or start with the variety that holds up best in Kansas's vine borer pressure: Seminole Pumpkin, the original Florida Native that has been thriving in difficult climates for centuries.

Sucrine du Berry is a slow grower in the best sense. It takes its time, asks for good soil and water and a long season, and then hands you something remarkable. Rare for a reason, and worth the patience.

← Back to Growing Guides