Tomato ‘San Marzano’ T4 Seeds – Italian Plum Tomato for Sauces

San Marzano T4 is the classic Italian plum tomato, grown for generations near Naples and considered the gold standard for sauces. The elongated, pointed fruits develop dense, meaty flesh with very few seeds and low water content, producing rich, velvety passata and intensely flavoured sauces.

This indeterminate variety is highly productive and rewards careful growing with an abundant late-summer harvest. When fully ripened on the vine, San Marzano tomatoes deliver the balanced sweetness and gentle acidity that define authentic Italian cuisine.

🌱 Growing at a glance
🌱 Sowing: February–April (indoors)
☀️ Light: Full sun, sheltered position
💧 Water: Regular, consistent watering
🌡️ Germination: 7–14 days at 18–24°C
📏 Height: Up to 180 cm (cordon)
🪴 Spacing: 50–60 cm
⏳ Harvest: August–September

🌿 Growing tips
Start seeds early under protection and provide strong support. Remove side shoots regularly and feed weekly once flowering begins to maximise fruit quality.

🍽️ Garden to Table
Perfect for simple, traditional Italian tomato recipes inspired by garden-grown ingredients.

👉 Discover the full Garden to Table recipe on our blog.