California Wonder Sweet Pepper is one of the oldest and largest heirloom bell peppers in cultivation, first introduced by California growers around 1928. These sturdy plants grow 18-30 inches tall and produce abundant blocky, thick-walled peppers that start green and ripen to a vibrant red. Reaching harvest in just 75 days, this variety thrives in full sun across hardiness zones 3-11 and rewards gardeners with generous yields of delicious, meaty fruit.
Full Sun
Moderate
3-11
30in H x 18in W
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High
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California Wonder earned its reputation over nearly a century for a reason: tall, vigorous plants consistently loaded with large, blocky peppers featuring exceptionally thick walls that stay crisp and sweet whether you harvest them green or wait for that deep red color. The fruit's substantial structure and reliable production made it a cornerstone of American vegetable gardens, and it remains remarkably easy to grow even for beginners. Gardeners appreciate both its productivity and its flexibility as a perennial in frost-free climates, though most grow it as a dependable annual.
California Wonder peppers excel in fresh eating, offering that crisp, juicy bite gardeners crave straight from the garden. The thick-walled structure makes them ideal for stuffing, roasting, or grilling, and their sweet flavor develops further once they ripen fully to red. Whether diced into salads, charred over flame, or preserved through freezing or canning, this variety's substantial fruit handles diverse culinary applications with equal success.
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Start seeds indoors 8-10 weeks before your planned transplant date. Sow seeds 1/4 inch deep in a warm seedbed kept at 70°F for germination (seeds typically sprout in 7-14 days). Maintain ideal soil temperature of 70-80°F during the germination and seedling stage. Transplant seedlings outdoors 2-4 weeks after your average last frost date, once daytime temperatures consistently reach 70°F and nighttime temperatures stay above 55°F.
Transplant hardened-off seedlings outdoors 2-4 weeks after your average last frost date, when daytime temperatures are at least 70°F and nighttime temperatures remain above 55°F. Space plants 24 inches apart in rows 24 inches apart. Bury the transplant at the same depth it grew in the pot. In mild climates, California Wonder may be sown in late summer for a fall or winter crop.
California Wonder peppers reach harvest readiness in approximately 75 days from transplanting. You can harvest at the green stage when peppers reach full size with blocky shape, or wait 2-3 additional weeks for them to turn that distinctive vibrant red, which signals peak sweetness. Cut peppers from the plant with a knife rather than pulling, which can damage branches. In frost-free zones where plants may overwinter, established plants can produce for multiple seasons.
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“California Wonder emerged from the work of California growers around 1928, arriving at a pivotal moment when American home gardeners were seeking reliable, high-yielding pepper varieties. Its early introduction and sustained popularity across generations speak to its exceptional combination of vigor, productivity, and flavor. As a true heirloom, it carries the genetic legacy of early 20th-century California agriculture, preserved and passed along by countless gardeners who recognized its value. Today it stands as one of the oldest bell pepper cultivars still widely grown, a testament to its enduring performance and the gardeners who stewarded it through the decades.”