Zone 3 · Peppers Growing Guide

When to Plant Cayenne Pepper
in Zone 3

Thin, hot peppers that dry beautifully. Prolific producer and easy to grow. Dry and grind your own cayenne powder — far better than store-bought.

Plant outdoors
Jun 1 – Jun 15
Start indoors
Apr 1 – Apr 15
Last Frost
~May 15
Days to harvest
70–80 days
Difficulty
Easy
Start indoors — Zone 3
Harvest window: Aug – Sep

Planting Calendar

In Zone 3, Cayenne 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.

Start indoors 8–10 weeks early. Short season — harvest green if frost threatens before full red.

Care Guide

Sunlight
Full sun · 6–8 hrs/day
Watering
Moderate
Spacing
18–24 inches
Soil
Well-draining, fertile loam
Days to maturity
70–80 days
Soil pH
6.0–6.8
plant tip · Zone 3

Start indoors 8–10 weeks early. Short season — harvest green if frost threatens before full red.

Feeding Schedule

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

Feed regularly during the long growing season. Reduce nitrogen once plants are flowering.

Companion Planting for Cayenne Pepper

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

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

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Common questions

In Zone 3, start cayenne pepper seeds indoors around Apr 1 – Apr 15, then transplant outdoors Jun 1 – Jun 15 after your last frost around May 15. Start indoors 8–10 weeks early. Short season — harvest green if frost threatens before full red.
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 cayenne pepper include Basil, Tomatoes, Carrots, Marigolds. Avoid planting near Fennel, Brassicas, which can compete for nutrients or attract pests.
Cayenne Pepper typically takes 70–80 days from transplant or direct sow to harvest in Zone 3. Expected harvest window: Aug – Sep.

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Cayenne Pepper in other zones
Crop Guides