California Wonder 300 TMR

Family: Solanaceae Sweet Pepper

Planting Schedule

Provide your location or planting zone to unlock dates and add California Wonder 300 TMR to a garden.

Sink your senses into California Wonder 300 TMR’s glossy, thick-walled bells—crisp, juicy sweetness with a bright snap that turns every harvest into a vivid garden moment.

The fruits mature in a handsome transition from deep green to a rich, true red, holding their shape with an even, blocky silhouette and a smooth, satin skin. Ideal for filling, grilling-style roasting, and vibrant fresh use, these peppers shine in sauces and quick pickles where their sweet flavor and substantial texture bring confidence to every batch.

Light: Full SunMaturity: 75 DaysHabit: Bush

Botanical illustration of California Wonder 300 TMR

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California Wonder 300 TMR Planting Dates by USDA Zone

Estimated US hardiness-zone windows for sow, transplant, and harvest. Enter a US ZIP above for exact local dates, or open a zone below.

Zone	Start Indoors	Sow / Transplant	Harvest
Zone 1a	Protected Environment Only
Zone 1b	Protected Environment Only
Zone 2a	Apr 6th	Jul 20th	Oct 3rd – Aug 29th
Zone 2b	Mar 27th	Jul 10th	Sep 23rd – Aug 25th
Zone 3a	Mar 27th	Jul 10th	Sep 23rd – Sep 1st
Zone 3b	Mar 31st	Jul 14th	Sep 27th – Sep 21st
Zone 4a	Mar 27th	Jul 10th	Sep 23rd – Sep 24th
Zone 4b	Mar 25th	Jul 8th	Sep 21st – Sep 27th
Zone 5a	Mar 20th	Jul 3rd	Sep 16th – Sep 30th
Zone 5b	Mar 16th	Jun 29th	Sep 12th – Oct 5th
Zone 6a	Mar 13th	Jun 26th	Sep 9th – Oct 10th
Zone 6b	Mar 7th	Jun 20th	Sep 3rd – Oct 16th
Zone 7a	Mar 2nd	Jun 15th	Aug 29th – Oct 20th
Zone 7b	Feb 20th	Jun 5th	Aug 19th – Oct 28th
Zone 8a	Feb 11th	May 27th	Aug 10th – Nov 5th
Zone 8b	Feb 2nd	May 18th	Aug 1st – Nov 12th
Zone 9a	Jan 16th	May 1st	Jul 15th – Nov 26th
Zone 9b	Dec 22nd	Apr 6th	Jun 20th – Dec 9th
Zone 10a	Continuous Production
Zone 10b	Continuous Production
Zone 11a	Continuous Production
Zone 11b	Continuous Production
Zone 12a	Continuous Production
Zone 12b	Continuous Production
Zone 13a	Continuous Production
Zone 13b	Continuous Production

Crop Details

Trait	Value
Days to Maturity	75
Sun Requirements	Full Sun
Growth Habit	Bush
Support Needed	Stake
Planting Depth	Normal
Germination Temp (°F)	80
Min Soil Temp (°F)	60
Min Night Temp (°F)	50
Harden Off (days)	10

Culinary Notes

Chef's Note

California Wonder 300 TMR is a thick-walled bell: it crunches first, then releases a sweet, watery juiciness that doesn’t collapse. Use it where you want structure—roasting, stuffing, or quick pickles—so each bite stays crisp against bold, salty partners.

Best Uses

stuff-and-bake halves that stay tender but not flimsy
grill-roast until blistered, then peel for smoky-sweet charred edges
quick pickles where the flesh keeps a clean bite
diced fresh in salads/salsas without turning watery

Flavor Profile

crisp, juicy sweetness bright, almost citrusy snap meaty, thick walls with low burn

Kitchen Pairings

olive oil garlic feta black beans chicken sausage smoked paprika

Frequently Asked Questions

How do I manage aphids and spider mites on Capsicum annuum (California Wonder 300 TMR)?

Check the undersides of leaves weekly for clusters of aphids and fine stippling/webbing from spider mites, especially during hot, dry spells. Spray affected plants with a strong jet of water first, then apply insecticidal soap (or horticultural oil) in the early morning, repeating every 5–7 days until activity stops. Avoid broad-spectrum insecticides that can flare pest outbreaks and keep plants evenly watered to reduce mite pressure.

How often should I water Capsicum annuum during the main growing phase (from transplant through fruit set)?

Water deeply so the root zone stays evenly moist, aiming for about 1–2 inches (2.5–5 cm) per week total rainfall plus irrigation, adjusted for heat and container vs. ground. During fruit set and early fruit growth, let the top 1 inch of soil dry between waterings to prevent soggy soil, then water again thoroughly. Mulch around the plants to steady soil moisture and reduce stress-related problems like blossom drop.

How can I tell when California Wonder 300 TMR peppers (Capsicum annuum) are ready to harvest?

Harvest when fruits reach full size and the skin is firm and glossy, typically around 75 days from transplant. California Wonder is often picked green, but you can also leave pods to mature to red for more sweetness—either way, harvest frequently to encourage continued fruiting. If peppers start to wrinkle or feel soft, they’re past their peak for best flavor.