San Marzano Tomato Seeds (Organic)

San Marzano Tomato is an heirloom variety renowned for its rich, sweet flavor and dense, meaty texture. The oblong fruit grows to about 3-4 inches long and is prized for its low seed count and thick flesh, making it perfect for sauces, canning, and slow-cooked dishes. Originating from Italy, this tomato is a favorite among chefs and gardeners for its authentic flavor and culinary versatility. Thriving in full sun and nutrient-rich, well-draining soil, San Marzano plants are indeterminate, producing fruit continuously throughout the growing season.

Variety Details

• Botanical name: Lycopersicon lycopersicum
• Plant type: Tender Annual
• Growth habit: Indeterminate
• Crop category: Tomato
• Kitchen profile: San Marzano Tomato is an heirloom variety known for its rich, sweet flavor and dense, meaty texture.
• Product format: Seed packet with a separately listed bulk option

Sowing & Growing

• Soil Temperature: 70-85°F
• Planting Depth: 1/2"
• Germination: 6-12 Days
• Height At Maturity: 5'-7'
• Days To Maturity: 70-90 Days
• Sun/Shade: Full Sun
• Spacing After Thinning: 15"-36"

Plan San Marzano Tomato as a warm-season crop. Start seed in a protected setting when local timing allows seedlings to reach transplant size after frost danger has passed. Provide strong light and avoid keeping the root zone continuously saturated. Use the recorded spacing and add support if the growth habit requires it. Check fruit as it changes color and firmness, then harvest at the stage suited to its intended kitchen use. Seasonal conditions can shift actual maturity.

Maturing in about 80-85 days, the plants are vigorous and require staking or caging for support.

Its heritage, ease of growth, and distinctive flavor make it a useful addition for any tomato lover’s garden.

The fruit grow to about 4" long and 2" in diameter and are borne in clusters.

Before sowing San Marzano Tomato, review the packet alongside the current product details and note any range in temperature, germination, or maturity. Ranges reflect biological and seasonal variation rather than a fixed promise. Label each planting with its date and location, then compare emergence, growth, and harvest with local weather. This record is useful for succession plantings and for deciding whether the crop fits better into an earlier or later seasonal window.

Explore related options in our Tomato Seeds.