Zone 3 · Peppers Growing Guide

When to Plant Bell Pepper
in Zone 3

Sweet peppers that start green and ripen to red, yellow, or orange. Need warmth and patience — green peppers are just unripe coloured peppers.

Plant outdoors
Jun 1 – Jun 15
Start indoors
Apr 1 – Apr 15
Last Frost
~May 15
Days to harvest
70–85 days
Difficulty
Medium
Start indoors — Zone 3
Harvest window: Aug – Sep

Planting Calendar

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

Very challenging in Zone 3. Choose California Wonder or Ace for shortest days. May not fully colour before frost.

Care Guide

Sunlight
Full sun · 6–8 hrs/day
Watering
Regular
Spacing
18–24 inches
Soil
Well-draining, fertile loam
Days to maturity
70–85 days
Soil pH
6.0–6.8
plant tip · Zone 3

Very challenging in Zone 3. Choose California Wonder or Ace for shortest days. May not fully colour before frost.

Feeding Schedule

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

Similar to tomatoes. High nitrogen early encourages leafy growth; switch to high-potassium at flowering.

Companion Planting for Bell Pepper

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

Grows well with
  • Basil
  • Carrots
  • Spinach
  • Tomatoes
Keep away from
  • Fennel
  • Brassicas
  • Apricots

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Common questions

In Zone 3, start bell pepper seeds indoors around Apr 1 – Apr 15, then transplant outdoors Jun 1 – Jun 15 after your last frost around May 15. Very challenging in Zone 3. Choose California Wonder or Ace for shortest days. May not fully colour before frost.
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 bell pepper include Basil, Carrots, Spinach, Tomatoes. Avoid planting near Fennel, Brassicas, Apricots, which can compete for nutrients or attract pests.
Bell Pepper typically takes 70–85 days from transplant or direct sow to harvest in Zone 3. Expected harvest window: Aug – Sep.

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Bell Pepper in other zones
Crop Guides