Tomato – San Marzano


SKU: ToSaM Category:


25 Seeds per pack

(Lycopersicon lycopersicum) 70-90 days       San Marzano is one of the most popular canning tomatoes in Italy! They have thick walls, are meaty, and very flavorful. This is a determinate strain of the almost legendary paste tomato, providing pounds and pounds of elongated-plum shaped tomatoes in a small space of time. Perfect for a productive round of canning! The smallish 2-5 oz, oblong, red fruits can be processed into a rich, thick paste or sauce with unforgettable flavor.  Also, great for making into soup, ketchup, roasting, drying, and even fresh eating (with their mild low-acid flavor). Holds well on vine or in storage. Crack-Resistant. Low acidity variety.

. Determinate

Planting Instructions for San Marzano Tomato Seeds

Start Tomato seeds indoors 6-8 weeks before last frost date. Plant the Tomato seeds ¼” deep in sterile seed starting mix. Germination occurs in 6-14 days in soil 70-90°F. Once true leaves develop, separate Heirloom / Open Pollinated Tomato plants into 3-4″ pots, placing in full light & cooler temps (60-70°F). Set out hardened off Tomato transplants, in full sun, once soil has warmed, 18-30″ apart, in rows 3-4′ apart. Plant tall, spindly San Marzano tomato seedlings deeper, the stems will sprout roots and support and strengthen the plant. To help prevent blossom end rot, put 1 Tbs of lime, ground oyster shells, or crushed eggshells at the bottom of your planting hole. The calcium will help build strong cell walls once your heirloom tomatoes plants start producing fruit. For strong San Marzano tomato plants, add 1 Tbs of aged compost and 1 Tbs of bone meal to the bottom of the hole as well.


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