Tomato, San Marzano ORGANIC


1021 in stock

(4 customer reviews)

What an incredible tomato! A great year-round tomato that even can be grown in the wintertime in milder parts of San Diego and Southern California. As a semi-determinate tomato, it provides pounds and pounds of plum tomatoes in a small space—great for making sauces and salsa!

1021 in stock

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What an incredible tomato! As a semi-determinate tomato, it provides pounds and pounds of plum tomatoes in a small space. It will require staking as it has an indeterminate growth pattern.

During our 2018 summer trials, this tomato took the cake on production and yield. We found that it is a wonderful winter tomato for mild areas of San Diego County and southern California. Because it has fewer seeds and juice than typical tomatoes it is great for making sauces and salsa. We loved this tomato for its creamy consistency.

Suggested Planting Requirements: Tomatoes can be direct sown or transplanted. For direct sowing, garden beds must be prepped and soil should be above 60 degrees. If you decide to transplant, start seeds in the greenhouse six weeks before the last frost, then transplant them into your garden. Tomatoes are unique in that they can be buried very deep. The tiny white hairs on the vegetable stalk will actually form roots. Some gardeners suggest planting them sideways. Tomatoes love fertile soil rich in organic matter. Add plenty of compost before planting. Soil pH is preferred between 5.5 and 7.0. Soil should be moist at planting time. Watering should be done at weekly intervals and overwatering avoided. To prevent disease, avoid overhead watering and water at the soil level.

Growing Recommendations: Tomatoes require full sun for healthy and fast growth. A balanced organic fertilizer should be added before planting in the garden. If you are aware of calcium deficiencies in your soil, it is likely your tomatoes will suffer from blossom end rot which is easily taken care of with the addition of a calcium amendment to the soil. During the growing season water at the soil level of the plants and avoid getting the foliage wet. Prune excess foliage and suckers for maximum production. More information on pruning suckers here. Pruning also helps to increase airflow for tomatoes and can help prevent diseases. Keep a lookout for pests like whiteflies which can decrease production.

Harvesting & Storage: Harvest when individual fruits are slightly tender to the squeeze of a finger. This may be before the tomatoes are fully colored.

History: The San Marzano tomato is named for its place of origin. This wonderful tomato came from the small town of San Marzano near Naples, Italy. It was grown in the volcanic soils in the shadow of Mount Vesuvius. This tomato is the genetic relative of the Roma and other popular past tomatoes. We’ve taken this tomato and regionally adapted it to Southern California and similar regions by growing it and selecting for climate-appropriate traits like resistance to powdery mildew and compactness.


Soil Temperature:75-85°F
Planting Depth:1/4″
Days to Germination:10-15
Days to Maturity:65-95+
Height at Maturity:4’-5’
Lighting Requirements:Full Sun
Spacing: 3’-4’


Lycopersicon lycopersicum

Package Weight: .25 gram

Approximate seed count per packet: 120 seeds 

Sows about a 100′ row taking into account thinning.

Additional information

Weight.01 g
Dimensions5.00 × 5.00 × 1.00 in

4 reviews for Tomato, San Marzano ORGANIC

  1. Siri (verified owner)

    Quick to sprout with gorgeous green leaves!

  2. Michael (verified owner)

    excellent order service…seeds just popping their heads up…glad I got some!
    Spring is ON

  3. emkoch4

    These are our absolute favorite right now. As recommended by San Diego Seed Co, we used them to make delicious tomato sauce — this variety produced a ton so we were able to can some as well. Will be growing these again this spring/summer!

  4. dalilagonzalez (verified owner)

    I can’t believe the amazing germination rate and how strong that seedlings were after being transplanted! I can’t wait for the plants to fruit so I can’t taste the deliciousness the other reviewers are talking about (:

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