HotPepperIndex
Capsicum annuum

Marconi Pepper

Italy
Sweet
Also known asGiant Marconi · Marconi Red · Marconi Italian · Italian Marconi Pepper
Scoville
0SHU
Heat0%
0–1k SHU · Garden.org lists 1-1000 SHU; Pepper Joe's and multiple seed catalogs list as 0 SHU sweet pepper

The Marconi Pepper is a classic Italian heirloom sweet pepper known for its exceptionally long, tapered fruits and rich, smoky-sweet flavor. It produces high yields of thin-walled peppers ideal for grilling, roasting, and frying. Available in red, golden, and purple variants, it matures from green to vibrant colors.

Marconi peppers, also called Giant Marconi or Marconi Red, are elongated Italian sweet peppers that can reach 8 to 12 inches in length and about 3 inches across at the shoulders. The fruits taper to a point and have thin walls with a crunchy texture, ripening from glossy green to deep red, golden yellow, or even purple depending on the cultivar. They offer a mild, sweet flavor with subtle smoky undertones that intensifies when cooked, making them perfect for Italian dishes, salads, sauces, and stuffing. Plants are compact, bushy, and productive, typically reaching 2.5 to 3 feet tall with high yields. The variety includes both heirloom strains from southern Italy and improved hybrids like the AAS-winning Giant Marconi. They are versatile for home gardens and excel in Mediterranean-style cooking.

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Backstory

Heirloom variety from southern Italy (regions like Calabria and Campania), improved in the US with the Giant Marconi hybrid winning All-America Selections in 2001 for its earliness, yield, and flavor.

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Flavor

Exceptionally sweet with smoky undertones and a hint of fruitiness that deepens when grilled or roasted; crunchier and thinner-walled than bell peppers.

sweetsmokymild fruity

Culinary uses

grillingroastingfryingstuffingsaladssaucespasta dishes

Q&A

Substitutions

CubanelleJimmy NardelloBell pepper (for milder sweetness)

Related variants

Appearance

Size
8-12 inches long, 2.5-3 inches wide at shoulders
Skin
glossy, thin-walled
Color
green ripening to red (or golden/purple variants)
Flesh
crisp, mild sweetness
Shape
elongated tapered horn shape with slight lobes at stem end

Growing

Sun
full sun
Soil
well-draining, fertile, pH 6.0-6.8
Notes
AAS winner 2001 for Giant Marconi; resistant to TMV and Potato Y Virus; high yields, adaptable
Water
consistent moisture, avoid waterlogging
Harvest
pick green or wait for full color; regular picking increases yields
Plant height
2.5-3 feet
Days to maturity
70-85

Nutrition

Calories
low (approx 20 per 100g)
Vitamin C
high
Antioxidants
present

Origin detail

Region
Southern Italy
Country
Italy
Breeder
Seminis Vegetable Seeds (for Giant Marconi hybrid)

Tags

sweetitalianfryingheirloomgrillingroasting

Sources

Huge shout-out to the breeders, growers, researchers, and seed savers linked below — their independent work is what lets us fact-check our own. Go visit them.

These references are used to verify what we publish — not as the source of the content itself. Seed catalogs, breeder pages, research papers, and cultivar databases let us cross-check every fact before it lands here. Open any card to read the original or dig deeper.

4 sources · 8 searches · Added May 12, 2026, 13:23 UTC
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