Zone 10 · Tomatoes Growing Guide

When to Plant Roma Tomato
in Zone 10

Paste tomato with meaty flesh and low moisture — ideal for sauces, canning, and drying. Reliable producer with fewer disease issues than slicers.

Plant outdoors
Jan 15 – Mar 1
Start indoors
Nov 15 – Jan 1
Last Frost
~Jan 15
Days to harvest
73–80 days
Difficulty
Easy
Ready to harvest — Zone 10
Harvest window: Mar – Jun

Planting Calendar

In Zone 10, Roma Tomato should be planted outdoors Jan 15 – Mar 1, after the average last frost date of approximately Jan 15. Start seeds indoors around Nov 15 – Jan 1 for a head start.

Cool season is primary window. Fall planting in September gives second crop through winter.

Care Guide

Sunlight
Full sun · 6–8 hrs/day
Watering
Moderate
Spacing
24–36 inches
Soil
Well-draining, fertile loam
Days to maturity
73–80 days
Soil pH
6.0–6.8
plant tip · Zone 10

Cool season is primary window. Fall planting in September gives second crop through winter.

Feeding Schedule

How often
every 2 weeks
Feed type
tomato feed (high potassium)
Key timing
start when first flowers appear

Feed regularly but avoid excess nitrogen — Roma tomatoes need potassium for firm, meaty fruit.

Companion Planting for Roma Tomato

What you plant next to roma tomato makes a real difference — some plants actively help, others compete or attract pests.

Grows well with
  • Basil
  • Marigolds
  • Carrots
  • Garlic
Keep away from
  • Fennel
  • Brassicas
  • Corn

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Common questions

In Zone 10, start roma tomato seeds indoors around Nov 15 – Jan 1, then transplant outdoors Jan 15 – Mar 1 after your last frost around Jan 15. Cool season is primary window. Fall planting in September gives second crop through winter.
Zone 10 has an average last spring frost of approximately Jan 15 and a first fall frost around Dec 31. These dates vary by specific location — use your ZIP code in the plant app for precision based on the nearest NOAA weather station.
Good companion crops for roma tomato include Basil, Marigolds, Carrots, Garlic. Avoid planting near Fennel, Brassicas, Corn, which can compete for nutrients or attract pests.
Roma Tomato typically takes 73–80 days from transplant or direct sow to harvest in Zone 10. Expected harvest window: Mar – Jun.

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Roma Tomato in other zones
Crop Guides