Caloro Pepper

The Caloro pepper is an open-pollinated wax-type cultivar of Capsicum annuum developed by Paul G. Smith at the University of California, Davis. Released through the California Agricultural Experiment Station, this stable California variety produces pendant, thick-walled conical fruits that undergo a distinct color transition from pale yellow to orange and finally bright red as they mature.

Engineered with notable resistance to tobacco mosaic virus (TMV), Caloro delivers a mild to medium heat rating ranging from 1,000 to 5,000 Scoville Heat Units. Its continuous fruiting habit, combined with sweet, tangy, and crisp flesh, makes it a favored multipurpose pepper for pickling, fresh salsas, and stuffing.

Origin and Genetics

Caloro was bred by Paul G. Smith at the University of California, Davis, and introduced via the California Agricultural Experiment Station. Developed as an open-pollinated, stable variety within Capsicum annuum, it was specifically selected to provide commercial growers and home gardeners with high-performing wax-type pods carrying strong resistance to tobacco mosaic virus (TMV).

Botanical Profile

The plant exhibits a compact, bushy growth habit characterized by green foliage and white flowers. It sets fruit continuously, yielding pendant pods with a smooth surface and exceptionally thick walls. The conical peppers transition through three distinct ripening stages, beginning as pale yellow or yellow-green, shifting to orange, and reaching full physiological maturity at bright red. Because pods at different stages of ripeness appear simultaneously alongside the green foliage, the plant holds high ornamental value.

Heat Profile

Caloro produces a mild to medium heat, measuring between 1,000 and 5,000 SHU on the Scoville scale. This makes its pungency profile comparable to or slightly milder than an average jalapeño, providing a noticeable yet gentle warmth that complements its dense flesh.

Flavor and Aroma

The thick pericarp of the Caloro pepper yields a crisp, succulent texture. Its flavor profile combines sweet and tangy notes, making it versatile across both immature yellow harvests and fully ripe red stages.

Cultivation

As an open-pollinated C. annuum cultivar, Caloro thrives in full sun and well-drained soil. Its continuous fruiting habit supports repeated harvests throughout the growing season, and its bushy stature makes it well-suited for container gardening as well as standard garden beds. Inherent resistance to tobacco mosaic virus provides added resilience against a common solanaceous pathogen.

Culinary Applications

Thanks to its thick, firm walls and manageable heat, Caloro is widely utilized for pickling and canning, where it maintains structural integrity. It is equally popular for stuffing, dicing into fresh salsas, and slicing raw for salads or garnishes.