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California Wonder heirloom bell pepper plant with glossy green and red blocky fruit

How to Grow California Wonder Pepper From Seed

By Maxim Kaufman — Founder & CEO, Organo Republic

Updated July 2026

California Wonder is the classic heirloom bell pepper: big, blocky, four-lobed fruit with thick, crisp walls that ripen from glossy green to sweet red. Introduced back in 1928, it stays a garden favorite because it is productive, reliable, and completely sweet with no heat at all. Here is what makes this variety special and how to get the best from it.

This is the quick guide to California Wonder. For the full step-by-step on starting seeds, transplanting, feeding, and troubleshooting peppers, see our complete guide to growing peppers from seed.

Quick start

Start seeds indoors about 8 weeks before your last frost, kept warm at 75 to 85F. Harden the plants off, then transplant them out 18 to 24 inches apart once nights stay above 55F. Give full sun, steady water, and a stake or cage for the heavy fruit. Pick peppers green from about 65 to 75 days, or leave them on the plant to ripen red and sweeter.

Best tip

California Wonder is a dependable, beginner-friendly bell, but it still needs warmth to fruit well. Start seeds indoors early and do not set plants out until nights are reliably above 55F. In hot-summer regions like Texas or Florida, give the plants a little afternoon shade during heat waves so the blossoms set instead of dropping, and be patient: the sweetest peppers are the ones you let ripen all the way to red.

At a glance

How to Grow California Wonder Pepper From Seed — growing specifications at a glance
Botanical name	Capsicum annuum
Plant type	Warm-season annual
USDA zones	3 to 12 (grown as an annual)
Sun	Full sun (6 to 8+ hours)
Days to maturity	65 to 75 days green; ~85 red
Height	18 to 24 inches
Spacing	18 to 24 inches apart
Water	Regular and deep; keep evenly moist

Uses

California Wonder is the classic all-purpose bell. Pick it green for a crisp, mild, grassy crunch in salads, sandwiches, fajitas, and stir-fries, or let it ripen red for a sweeter flavor that is wonderful roasted. The thick, blocky, four-lobed walls make it ideal for stuffing and for freezing, and with zero heat it is a family favorite that even kids enjoy.

Frequently asked questions

How long does California Wonder pepper take to mature?

About 65 to 75 days from transplant to full-sized green peppers, and another two weeks or so if you want them to ripen red and even sweeter.

Is California Wonder sweet or hot?

Sweet, with zero heat. As a bell pepper it has no capsaicin at all, so it measures 0 on the Scoville scale, and it gets even sweeter as it ripens from green to red.

Can I let California Wonder peppers turn red?

Yes. Green is fully usable, but if you leave the fruit on the plant it ripens to a deep red that is sweeter and higher in vitamins. Ripening slows new fruit set, so pick some green to keep production going.

How big do California Wonder plants get?

Compact upright bushes about 18 to 24 inches tall. The blocky, four-lobed fruit is heavy, so a stake or small cage keeps branches from bending or snapping.

Ready to grow your own? Heirloom California Wonder seeds give you crisp green bells that ripen sweet and red all summer. For the full step-by-step, see our complete pepper growing guide linked at the top of this page.

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Want more peppers? These value packs pair sweet bells like California Wonder with other varieties:

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By Maxim Kaufman — Founder & CEO, Organo Republic

Maxim founded Organo Republic in 2017 and personally selects, tests, and grows the heirloom, non-GMO varieties the company offers. Under his leadership, Organo Republic was named Agri Business Review’s Top Non-GMO Seed Variety Solution 2026.