Zone 3 · Tomatoes Growing Guide

When to Plant Grape Tomato
in Zone 3

Oval, thick-walled little tomatoes with a lower water content than cherry types — less splitting after rain. Very prolific and excellent for snacking and salads.

Plant outdoors
Jun 1 – Jun 15
Start indoors
Apr 15 – May 1
Last Frost
~May 15
Days to harvest
60–70 days
Difficulty
Easy
Wrong season — Zone 3
Harvest window: Aug – Sep

Planting Calendar

In Zone 3, Grape Tomato should be planted outdoors Jun 1 – Jun 15, after the average last frost date of approximately May 15. Start seeds indoors around Apr 15 – May 1 for a head start.

Choose Juliet or other fast-maturing grape types. Short season means starting indoors is essential.

Care Guide

Sunlight
Full sun · 6–8 hrs/day
Watering
Regular
Spacing
24–36 inches
Soil
Rich, well-draining loam
Days to maturity
60–70 days
Soil pH
6.0–6.8
plant tip · Zone 3

Choose Juliet or other fast-maturing grape types. Short season means starting indoors is essential.

Feeding Schedule

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

Light feeder compared to beefsteak types. Consistent feeding produces sweeter fruit.

Companion Planting for Grape Tomato

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

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

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Common questions

In Zone 3, start grape tomato seeds indoors around Apr 15 – May 1, then transplant outdoors Jun 1 – Jun 15 after your last frost around May 15. Choose Juliet or other fast-maturing grape types. Short season means starting indoors is essential.
Zone 3 has an average last spring frost of approximately May 15 and a first fall frost around Sep 15. 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 grape tomato include Basil, Carrots, Marigolds, Parsley. Avoid planting near Fennel, Brassicas, Corn, which can compete for nutrients or attract pests.
Grape Tomato typically takes 60–70 days from transplant or direct sow to harvest in Zone 3. Expected harvest window: Aug – Sep.

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Grape Tomato in other zones
Crop Guides