SproutSmart
SproutSmart™ Intelligent Garden Sowing

San Marzano Nano

Tomato
Zone 6b Save Garden

Planting Schedule

Add San Marzano Nano to your garden to build a schedule and get reminders.
Botanical illustration of San Marzano Nano
75d to harvest

Sun-warmed and richly aromatic, San Marzano Nano brings a dense, meaty sweetness with a classic tang—its flavor feels concentrated, like a garden secret kept in miniature. The fruits are compact and elongated, with a smooth, firm texture and few seeds, making them ideal for thick, spoonable results and deep red color in every jar. Grow this 75-day paste tomato for abundant harvests that reward both fresh slicing and long-simmered favorites with a distinctly San Marzano character.

Sowing Tips

Transplant Conditions

Wait until soil reaches 60°F and nights stay above 50°F before moving outdoors. Harden off for 8 days first.

Expert Note

For the most paste intensity, transplant into warm soil (around 60°F+) and keep plants evenly watered while avoiding late nitrogen boosts.

Crop Dates

MilestoneDate
Start IndoorsMar 7th
Last FrostApr 25th
Transplant / Sow OutdoorsJun 13th
Harvest BeginsAug 27th
Harvest EndsOct 16th

Crop Details

TraitValue
Days to Maturity75
Sun RequirementsFull SunFull sun
Growth HabitDeterminate
Support NeededCage
Planting DepthDeep
Germination Temp (°F)75
Min Soil Temp (°F)60
Min Night Temp (°F)50
Harden Off (days)8

Today's Conditions

Outdoor planting for San Marzano Nano in Zone 6b typically begins around 2026-06-13. Wait until soil reaches at least 60°F before transplanting San Marzano Nano.

Garden Alerts

In Zone 6b, the average last spring frost is around April 25. Watch soil temperature before transplanting San Marzano Nano.

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Frequently Asked Questions

What pest or disease is most common on Solanum lycopersicum (tomato) and how do I treat it in the home garden?
A frequent problem is early blight (Alternaria) showing as dark, concentric “target” spots on older leaves. Remove and discard the infected leaves, avoid overhead watering, and apply a labeled protective fungicide early in the season and after rainy/humid spells to prevent new spots from spreading.
How often should I water San Marzano Nano tomatoes during the main growing phase?
During flowering and fruit set, keep soil consistently moist but not soggy—aim for about 1–2 inches of water per week total, adjusted for heat and container size. Water deeply at the base when the top 1 inch of soil dries, since irregular moisture can trigger blossom-end rot and fruit cracking.
How can I tell when Solanum lycopersicum “San Marzano Nano” is ready to harvest?
Harvest when fruits are fully colored (deep red), feel firm but not rock-hard, and have reached the variety’s typical size for a mature fruit. If nights are warm, expect harvest around ~75 days from transplanting and pick regularly to keep new fruit setting.

Sowing Tips

Transplant Conditions

Wait until soil reaches 60°F and nights stay above 50°F before moving outdoors. Harden off for 8 days first.

Expert Note

For the most paste intensity, transplant into warm soil (around 60°F+) and keep plants evenly watered while avoiding late nitrogen boosts.

Botanical illustration of San Marzano Nano

Sun-warmed and richly aromatic, San Marzano Nano brings a dense, meaty sweetness with a classic tang—its flavor feels concentrated, like a garden secret kept in miniature. The fruits are compact and elongated, with a smooth, firm texture and few seeds, making them ideal for thick, spoonable results and deep red color in every jar. Grow this 75-day paste tomato for abundant harvests that reward both fresh slicing and long-simmered favorites with a distinctly San Marzano character.