Tomato Paste Roma Indeterminate San Marzano 100 Non-GMO, Heirloom Seeds

A cluster of bright red Roma San Marzano tomatoes still attached to their green vines.
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Tomato Paste Roma Indeterminate San Marzano 100 Non-GMO, Heirloom Seeds

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  • Hand-Packed at Our Farm in Rossville, Texas
  • Always Non-GMO
  • Easy to Grow Seeds
  • Veteran-Owned & Family Operated

Tomato Paste Roma Indeterminate San Marzano is the world's most celebrated canning tomato — Italy's gold standard for sauces, purees, and preserves. Grown in clusters on vigorous indeterminate vines, these fruits mature to a deep red with dense, meaty flesh, minimal seeds, and thick walls that yield rich, concentrated flavor. Crack-resistant and high-yielding, San Marzano produces continuously throughout the season, delivering exceptional harvests of paste tomatoes that stretch further and cook down faster than watery slicing varieties. Whether you're making Sunday gravy, homemade salsa, or stocking your pantry for winter, this is the tomato that serious home canners and sauce makers rely on. Matures in approximately 80 days from transplant.

Germination Rate: 81%. Test Date: 8/25. TLM.

Why Choose San Marzano Paste Tomato?

  • Italy's #1 Canning Tomato: The authentic San Marzano variety renowned worldwide for rich flavor, meaty texture, and superior processing quality.
  • Dense, Low-Moisture Flesh: Minimal seeds and thick walls yield more finished product per pound and reduce cooking time significantly.
  • Crack-Resistant: Durable fruits hold well on the vine and in storage, preserving quality during processing.
  • High-Yielding: Grows in clusters and produces abundantly throughout the season on indeterminate vines.
  • Heirloom & Open-Pollinated: Passed down through generations — save seeds year after year for a self-sustaining garden.
  • Non-GMO Seeds: Plants whose DNA has not been altered in ways that do not occur naturally through traditional breeding methods.

Planting Tips for Success

  • Sunlight: Full sun — at least 6–8 hours per day for best fruit development and flavor concentration.
  • Soil: Rich, well-drained soil with a pH of 6.0–6.8. Amend with compost before planting.
  • Planting: Start seeds indoors 6–8 weeks before last frost date. Transplant outdoors after all danger of frost has passed and soil temps are above 60°F.
  • Spacing: Space plants 18–24 inches apart in rows 36–48 inches apart to allow for proper air circulation.
  • Support: Use sturdy stakes, cages, or trellises — indeterminate vines require support throughout the season.
  • Watering: Keep soil consistently moist, especially during fruit development. Avoid over-watering to prevent root rot and cracking.
  • Fertilizing: Feed with a balanced fertilizer at transplant, then switch to a low-nitrogen formula once flowering begins.
  • Harvesting: Ready in approximately 80 days from transplant. Harvest when fruits are deep red and firm — ideal for immediate processing or short-term storage.

Why Choose David's Garden Seeds®?

  • Veteran-Owned: Supplying premium seeds since 2009.
  • GO TEXAN Certified: Supporting local agriculture and communities.
  • Integrity Pledge: We pledge to sell only non-GMO, open-pollinated seeds. Read our Safe Seed Integrity Pledge.
  • Vegetable Seed License: All seeds sold under our standard Vegetable Seed License.

Cooking Methods

  • Pasta Sauce: The classic use — simmer with garlic, olive oil, and basil for an authentic Italian Sunday sauce.
  • Canning & Preserving: Ideal for whole-pack canning, crushed tomatoes, and tomato puree — low moisture means more yield per jar.
  • Salsa: Meaty flesh and low water content make San Marzano perfect for thick, flavorful fresh or cooked salsa.
  • Roasting: Halve and roast at 375°F for 45 minutes with olive oil and herbs to concentrate sweetness for spreads and pizza sauce.
  • Pizza Sauce: The gold standard for authentic Neapolitan-style pizza sauce — simply crush by hand with salt and olive oil.

Order San Marzano Tomato Seeds Today

Order yours today and grow your own authentic San Marzano paste tomatoes in your spring and fall gardens.

Nutritional Information

(Applies to harvested tomato fruit, not seeds. Per medium tomato, approx. 123g.)

  • Calories: 22
  • Total Fat: 0.2g
  • Sodium: 6mg
  • Total Carbohydrate: 4.8g
  • Dietary Fiber: 1.5g
  • Total Sugars: 3.2g
  • Protein: 1.1g
  • Vitamin C: 17mg (19% DV)
  • Potassium: 292mg (6% DV)

Important Disclosures

  • Variety Disclaimer: Heirloom varieties may exhibit natural variation in size, color, and maturation. Results may vary based on growing conditions, climate, and gardening practices.
  • Seed Storage: Store seeds in a cool, dry location. Properly stored seeds remain viable for 2–3 years.
  • Planting Zones: Best suited for USDA Hardiness Zones 5–11. Particularly well-adapted to Texas, the Southwest, and Southeast growing regions.

Grow something beautiful. Grow something delicious. Grow with David's Garden Seeds®.