California Wonder 300 TMR

Family: Solanaceae Sweet Pepper

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

Planting schedules and alerts are optimized for Columbus (Zone 6b).

Crop Dates

Milestone	Date
Start Indoors	Mar 7th
Last Frost	Apr 25th
Transplant / Sow Outdoors	Jun 20th
Harvest Begins	Sep 3rd
Harvest Ends	Oct 16th

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.