Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Solanaceae
Native
Andes
Life Cycle
Annual
Plant Height
Tall (Greater than 24")
Further Information
Growing Conditions
Frost Sensitive
About San Marzano Roma Pole Tomato Seeds
Solanum lycopersicum
3"–4" long, 1 ½" wide, oblong, red fruits. 'San Marzano' is a "paste" tomato.
Planting Tomato
Days to Maturity
70–90 days from transplanting
Plant Spacing
A group of 3 seeds every 24"–36"
Light Required
Full sun
Plant Height
Tall (Greater than 24")
Planting Depth
¼"
Coverage & Planting Details
| Coverage | This packet yields approximately 20 plants when started inside. |
|---|---|
| Row Spacing | 36" |
| Seed Depth | ¼" |
| Seed Spacing | A group of 3 seeds every 24"–36" |
| Thinning | When 2" tall, thin to 1 every 24"–36" |
| Germination | 5–10 days |
| Start Indoors | RECOMMENDED. 4 to 6 weeks before transplanting. Transplant when air temperature is 45°F or warmer, usually 1 to 2 weeks after your average last frost date. Ideal soil temperature for germination is 70°–90°F. |
| Direct Sow | For mild climates only: 1 to 2 weeks after your average last frost date, and when soil temperature is at least 60°F. |
| Growing & Harvesting | San Marzano' tomatoes are at the peak of sun-ripened deliciousness when red, and have a slight give when gently squeezed. |
Find Your Frost Date & Grow Zone
Average First Frost Date
October 19
Average Last Frost Date
May 19
Your Hardiness Zone is
5b
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Rating
Which best describes you as a gardener?
61 reviews
- BethCA, United StatesVerified ReviewerRated 5 out of 5 stars11/2/26Prolific and Delicious
I got a late start with my San Marzano last year (2025) and I only had one plant in a 5 gal bucket. It survived the winter and has thrived since, in spite of my occasional neglect. It has to have grown through the bottom of the container and found its own water source. It pretty much has a trunk vs a stem, and took over the deck. I had to start harvesting the tomatoes green bc otherwise the critters would get to them. No problem because these tomatoes (unlike another Roma I have) ripen to perfection on the counter. The photo is the green tomatoes I harvested today from the massive pruning I did. There are still more on the plant and, never mind that it’s 1 November, it’s still flowering! I’m hoping it will survive another winter, in which case I will espalier it along my deck rail.
Which best describes you as a gardener? BeginnerWho do you grow for? YourselfHow do you prefer to grow? Raised BedBIBotanical Interests11/3/26Hey Beth,
We're so happy to hear about your incredible success with our San Marzano Roma Pole Tomato Seeds! A single plant thriving through the winter, growing that strong, and still flowering in November is amazing. We think your espalier plan for next season sounds fantastic! Thank you for sharing your photo of your amazing harvest!
Thanks so much for sharing your experience with us and our gardening community. Your story is really inspiring!
Keep on growing 🌻
- gary h.AL, United StatesVerified ReviewerRated 1 out of 5 stars9/19/26No non-gmo
I don't see anything saying these seeds are non-gmo which means I'd have to keep buying your seeds so I will be cancelling my membership and not buying from you
Who do you grow for? YourselfHow do you prefer to grow? Raised BedBIBotanical Interests9/24/26Hey Gary,
Along with Non-GMO Project verification, many of our seeds are also certified organic, heirloom, or even both!
Here’s a quick breakdown:
Certified Organic: These seeds come from farms that follow strict USDA guidelines for things like soil health, natural pest control, and approved fertilizers.
Conventional: Seeds that aren’t certified organic are labeled as "conventional," but they’re still non-GMO and high quality. The Non-GMO Project verifies that seeds are free from GMO contamination by testing for GMO genes, which can sometimes sneak in through natural processes like cross-pollination. For instance, a bee can fly up to 2 miles and carry pollen from a GMO crop to a nearby non-GMO field—nature’s pretty wild like that!
Heirloom: These are open-pollinated varieties (you can save seeds from them!) that have been passed down for generations. We consider a variety heirloom if it's 50+ years old or native to a specific region—and it can be grown using either organic or conventional methods.
You’ll find lots of our varieties are both organic and heirloom, and you can easily filter for those options while browsing our website.
We hope you'll continue to be stay a part of our gardening community! Keep on growing 🌻️ - MichaelRated 5 out of 5 stars8/9/265 Stars
Fast delivery!
- MichaelRated 5 out of 5 stars8/9/265 Stars
Fast delivery!
- Lacy T.OK, United StatesVerified BuyerRated 5 out of 5 stars8/4/26Good germination
These all sprouted fast. Haven’t started radishes yet because Oklahoma still feels like the inside of satan’s butthole.
Who do you grow for? YourselfHow do you prefer to grow? Raised BedBIBotanical Interests8/4/26Hey Lacy,
We're so happy to hear that your San Marzano Roma Pole Tomato Seeds sprouted fast! There's nothing better than quick germination to get your growing season off to a great start. We totally get the Oklahoma heat situation - when the time is right for those radishes, they'll be ready to go! Thanks so much for sharing your experience with us, and we can't wait to hear how those tomatoes turn out. Keep on growing 🌻