I've been struggling to grow San Marzano tomatoes for the past four years. Every single one develops bottom rot, which is super frustrating since other varieties thrive in my garden. I've also had a solid pepper yield this year! Is there anyone in the Pacific Northwest who's successfully grown San Marzano tomatoes? What's the secret?
3 Answers
I totally get your frustration! I've been dealing with the same issue, and it seems to be quite common. Some folks say that the plants might have a few good tomatoes at first but eventually sort it out. I had three that grew a bit without rot, but then they stalled out. Honestly, I’m switching back to Romas next year since they’re doing so well for me.
Bottom rot usually comes from a calcium deficiency, often due to inconsistent soil moisture. I installed a watering system that keeps my soil consistently moist, and I've had no issues with end rot since then. It really made a difference for me!
I’m planning to set up an irrigation system next spring too. Maybe I’ll give the San Marzano another try after that. Thanks!
Honestly, I find Rio Grande tomatoes much easier to manage compared to San Marzano or Roma. Have you thought about trying different plum varieties? They could save you a lot of stress!
You might be onto something! I’m determined to get those San Marzanos to grow, but I’ll definitely consider switching it up next summer. Thanks!

I’m thinking of giving it one last shot next summer, just to see if I can figure it out!