Photo: "san marzano tomatoes" by Jim Lukach
· CC BY 2.0
Tomato · Paste
San Marzano Tomatoes
Indeterminate · Solanaceae
Unlike Roma, San Marzano is INDETERMINATE. True heirloom OP has no disease codes. DOP-protected Italian origin (Campania). Best cooking/sauce tomato. Two seed pockets, easy-peel skin.
At a Glance
Days to Maturity
78–88 days
Sun
8+ hours
full sun
Spacing
30–42 "
Seed Start
8–10 weeks
before transplant
Container
Not Ideal
15+ gallon pot
Height
5–7 ft
Zone Planting Guide
Growing Guide
Germination
Germination Time
6–14 days
Optimal Temp
80°F
Seed Depth
0.25"
Transplanting
Min Soil Temp
60°F
Harden Off
10 days
Watering
Weekly Water
1.5–2 "
Needs
Consistent
Method
Drip
Soil
pH Range
6.2–6.8
Support
Stake
Resilience
Heat: Low
Cold: Low
Drought: Low
Common Problems
blossom-end-rot
Cause: 4-6 oz fruit
Prevention: Consistent watering, gypsum
early-blight
Cause: Fungal
Prevention: Fungicide program
Nutrition
Feeding Intensity
Heavy feeder
Calcium
Critical — supplement recommended
Recommended Recipes
Root drench, Silica foliar, Worm castings topdress, Compost tea, Copper fungicide
Harvest
Full deep red. 4-6 oz elongated. Easy-peel skin. Two seed pockets.
Expected Yield
15–25 lbs/plant
Storage
3 days — Room temp.
Companion Planting
Good Companions
Genovese basil
Repels aphids
French marigold
Repels nematodes
Avoid Planting Near
Herb fennel
Allelopathic
Sources
seed_catalog
Baker Creek; Johnny's; Fedco
university
Clemson Extension
More Tomatos
San Marzano Tomatoes Planting Dates by Zone
Planting dates for San Marzano Tomatoes vary by USDA hardiness zone. Select your zone below for frost dates, start-indoors timing, and a full monthly planting calendar.
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