VegetablePepper
Cal Wonder Pepper
Cal Wonder Pepper is a classic open-pollinated sweet pepper that has earned its place as one of the world's most recognizable bell peppers. This heirloom variety produces thick-walled fruits that mature from green to a vibrant red, with absolutely no heat and a clean, sweet flavor. Growing 18 to 30 inches tall in an upright habit, it reaches harvest in 70 to 79 days from transplant and thrives across hardiness zones 4 through 13. Its reputation for ease, reliability, and exceptional yields has made it a garden standard for nearly a century.
Photo © True Leaf Market
Growing Conditions
USDA Zone
4-13
Sunlight
Full Sun
Water
Moderate
Soil
Well-drained, Fertile Loam With Organic Matter
Growth Stats
30 in
Height
TypeUpright
Spacing
12
Plant Profile
Sunlight
Full Sun
Water
Moderate
Zones
4-13
Size
30in H x ?in W
Growth
—
Care
High
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Highlights
Cal Wonder earned its legendary status by delivering consistent, abundant harvests of blocky, thick-walled peppers with genuinely exceptional sweetness and zero heat. This variety handles drought with ease and grows equally well in containers, raised beds, or garden soil, making it adaptable to almost any growing situation. The improved TMR strain offers Tobacco Mosaic Virus resistance, protecting your plants from one of the most troublesome pepper diseases.
Common Uses
Cal Wonder peppers excel at roasting, where their thick walls and sweet flesh shine. Stuff them whole with grains or cheese, slice them into salads for crisp sweetness, or char them over flame for a smoky, caramelized depth. Their substantial size and hollow interior make them ideal for raw eating straight from the garden, and they freeze beautifully for winter use.
Growing Timeline
No timeline data available yet for this variety.
Care Instructions
Start Indoors
Start seeds indoors 8 to 10 weeks before your last spring frost. Sow seeds at a depth of 1/4 inch in warm soil (70 to 80 degrees Fahrenheit is ideal for germination). Maintain consistent moisture and provide bright light once seedlings emerge.
Transplant Outdoors
Harden off seedlings gradually over 7 to 10 days, exposing them to increasing periods of outdoor conditions before final planting. Transplant outdoors once all danger of frost has passed and soil temperature reaches at least 60 degrees Fahrenheit. Space plants 12 inches apart in rows 36 inches wide, in full sun locations.
Harvesting
Cal Wonder peppers can be harvested at the immature green stage, typically 70 to 79 days after transplanting, or allowed to mature to deep red for maximum sweetness. Harvest green peppers when they reach full size with glossy skin; for red peppers, wait an additional 2 to 3 weeks after the fruit reaches full green maturity. Use a sharp knife or pruners to cut peppers from the plant rather than pulling, to avoid damaging branches. The fruits will continue ripening after harvest if kept at room temperature.
Pruning
No pruning is necessary for Cal Wonder. Its upright, compact growth habit (18 to 30 inches tall) naturally stays manageable. You may remove lower leaves once flowering begins to improve air circulation and reduce disease pressure.
Growing Calendar
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Companion Planting
Pests & Diseases
Ecology & Traits
Edible
Scientific Classification
Capsicum annuum
Family
Solanaceae
Genus
Capsicum
Growth Habit
Upright
Native Status
L48 (NI)HI (I)PR (I)VI (I)
History & Origin
“Cal Wonder emerged as an improved cultivar of the original California Wonder, deliberately bred to include Tobacco Mosaic Virus resistance while retaining the parent variety's legendary productivity and sweet flavor. This enhanced version represents decades of refinement, combining the forgiving nature that made the original so popular with modern disease protection. The variety's journey from California agriculture to becoming perhaps the most recognizable sweet pepper worldwide speaks to its genuine superiority in both yield and reliability.”