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Item Number: SNV5961

Rossa Lunga di Firenze Onion Seeds

Intermediate Day Sweet Mild Red Onion

Rossa Lunga di Firenze onion seeds offer home gardeners and small-scale farmers a beautiful and flavorful heirloom variety with deep roots in Italian culinary tradition. This elongated, red-skinned onion produces tender, mildly sweet bulbs perfect for slicing raw, grilling, or adding depth to savory dishes. With its unique torpedo shape and striking color, it adds both flavor and visual appeal to garden beds and kitchen tables alike.

Best grown in full sun and loose, fertile soil with good drainage, this short-day variety performs well in warmer climates and can be grown as a spring or fall crop in milder regions. It requires consistent moisture and benefits from regular feeding to support healthy bulb development. Though often enjoyed fresh, Rossa Lunga di Firenze also cures well for short-term storage.

Whether you're expanding your heirloom collection, experimenting with Italian garden staples, or simply looking for a reliable, mild onion, this variety offers versatility, resilience, and historical charm. Start indoors or direct sow depending on your region, and expect a productive crop within 90–100 days.

For more unique heirloom vegetables and onions, browse our full collection of onion and allium seeds.

Onion – Rossa Lunga di Firenze – Allium cepa

Did You Know? This variety has been grown for centuries around Florence and is often featured in Tuscan recipes for its delicate texture and sweet, complex flavor.

Soil Temperature: 60–85°F
Planting Depth: 1/4"
Germination: 10–14 Days
Height At Maturity: 12"–18"
Days To Maturity: 90–100 Days
Sun/Shade: Full Sun
Spacing After Thinning: 3"–4"

Quantity Discounts for Rossa Lunga di Firenze Onion Seeds
Buy 5 for $3.59 each
Buy 25 for $3.39 each
$3.99
Next-day shipping available

Check Your Zone Compatibility:

Shipping Information

Ships from Northern CA.

Shipping Weight: 0.01 lb

Dimensions: 4.5"L x 3.125"W x 0.1"H

Features

  • Bulb
  • Does Not Require Support
  • Heirloom
  • Mild Flavor
  • Requires Summer Water

Characteristics

USDA Growing Zone: 3 - 10
Approximate Harvest Time : Early Summer
Approximate Harvest Time : Late Summer
Growth Habit : Upright
Life Cycle : Annual
Plant Family : Amaryllidaceae (Alliums)
Planting Time : Spring
Planting Time : Winter
Seed Unit Sizes : Seed Pack
Soil pH : 6.1 - 6.5
Soil pH : 6.6 - 7.0
Starting Location : Direct Sow
Starting Location : Start Indoors & Transplant
Sun Requirements : Full Sun

Planting & Care

Soil & Water:Sow seeds in well worked fertile soil in full sun. Keep bed evenly moist. Add aged manure or compost with bonemeal to bed before seeding. Weed carefully and mulch to conserve moisture. Side dress lightly during growing season with a general purpose fertilizer. Stop fertilizing during last 2 months.

Planting & Growing: To start outdoors, sow 1 inch apart in rows 8 inches apart. Cover with 1/4 inch soil, firm and keep moist. Think gradually to 4" spacing. To start indoors, sow 1 inch apart in containers of seed starting mix and cover 1/4 inch deep. Provide a strong light source until 2-3 inches tall. Transplant 4 inches apart, burying crowns 1 inch deep.

Harvesting & Storage: Harvest about mid-summer when sized up and half tops are bent over. Stop watering and bend over remaining tops and lay in the sun for another 7-10 days. Store in cool, airy place. Use soon.

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Customer Reviews

Based on 2 reviews
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M
MEk
Very Good!!

These have always done well for me and are delicious!!

S
Suzanne
Nice flavor

I had a good crop of smaller onions, but they had nice flavor and kept quite well. Very few bolted.