Warm-season crop
When to Start and Transplant Peppers by Frost Date
Build a pepper schedule from local freeze normals, including an early indoor start, warm transplant window, spacing, and maturity range.
Reviewed by Garden By ZIP Editorial Review ·
- Spacing
- 18–24 in
- Seed depth
- 0.25–0.25 in
- Typical maturity
- 60–90 days
Quick answer
Start peppers indoors about 8–10 weeks before the last spring freeze reference. Move hardened plants outside about 2–4 weeks after it, when nights and soil are reliably warm. Use the planting calendar to apply the rule to a ZIP.
Planting methods
An indoor start is the dependable method because pepper seedlings grow slowly in cool conditions. Use warm media, strong light, and enough time for hardening. Transplants should not be rushed merely because the freeze date has passed.
Spacing, depth, and maturity
Cover seed about 1/4 inch. Space typical garden peppers 18–24 inches apart. Variety maturity often runs 60–90 days from transplant, with ripe-color harvest later than green harvest.
Worked local-calendar example
With a 50% last spring freeze reference of April 19, an 8–10 week indoor window falls from early February into late February. A cautious transplant range falls in early to mid-May. Treat the dates as an example and compare them with current temperatures.
Common mistakes
- Starting too late for the local warm season.
- Moving plants outside after one warm afternoon while nights remain cold.
- Reading days to maturity as a guarantee for ripe fruit.
Limitations
Pepper response varies by type, cultivar, container size, and heat. A freeze normal cannot confirm soil warmth or predict a late cold event.