Stupice

Stupice (Solanum lycopersicum) is an early-maturing heirloom tomato cultivar originating from Central Bohemia in the former Czechoslovakia. Bred by Jaroslav Duchoň under the Czech name ‘Stupické polní rané’, this open-pollinated variety was introduced to North America in 1976 via Seed Savers Exchange. The indeterminate, climbing vines feature broad, green potato-leaf foliage and bear clusters of small, globose red fruits.

Celebrated for its high cold tolerance, Stupice sets fruit reliably during cool spring and early summer conditions where many standard cultivars struggle. Its smooth-skinned, small saladette tomatoes ripen uniformly to a deep red, offering a juicy interior with a rich, balanced sweet-tart flavor. The plant maintains steady, high productivity across an extended season, continuing to yield into cool autumn weather.

Origin and Genetics

Stupice originated in the Central Bohemia region of what is now the Czech Republic, where it was bred by Jaroslav Duchoň. Initially selected under the name ‘Stupické polní rané’ (meaning Stupice Early Field Tomato), the cultivar became known internationally simply as Stupice or Stupice Early. The cultivar entered widespread North American cultivation following its 1976 introduction by the Seed Savers Exchange. As an open-pollinated heirloom, its distinctive potato-leaf morphology provides an easily identifiable visual marker for seed savers monitoring varietal purity.

Botanical Profile

The plant exhibits an indeterminate climbing habit characterized by distinctive potato-leaf foliage rather than standard dissected tomato leaves. Its foliage is green, accompanied by small yellow flowers. Fruits belong to the saladette class and are small, globose, and smooth-surfaced with no ribbing. Immature green fruit ripens uniformly into solid red shoulders and flesh, producing juicy, red-fleshed tomatoes with a classic spherical shape.

Growth and Performance

Stupice is noted for early-season maturity and extended productivity. Its defining horticultural strength is cold stress tolerance, allowing it to initiate fruit set under cool early-season temperatures that often impede blossom set in other heirloom varieties. The indeterminate vines deliver high yields continuously over a long production window, remaining productive through late-season cool autumn weather.

Flavor and Aroma

The flavor profile is categorized as sweet, tangy, and rich. Stupice features a well-balanced sweet-tart acidity characteristic of classic early-season heirloom tomatoes, supported by a tender, exceptionally juicy interior flesh texture.

Cultivation

Stupice requires full sun and is suited for both open field cultivation and greenhouse production. Because of its cold tolerance and early maturity, it is especially well adapted to short-season and cool-summer growing regions. Vining indeterminate growth requires trellising or staking to support the weight of continuous fruit clusters.

Culinary Applications

Because of its juicy flesh and vibrant sweet-tart balance, Stupice is primarily used for fresh eating, salads, and slicing. The small, uniform red fruits are also suitable for whole-pack canning. Due to its high moisture content, it is not suited for paste production or stuffing.