How to Grow Serrano Pepper
Get Your Exact Serrano Pepper Planting Dates
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Supplies You'll Need
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Plant Overview
Growing Requirements
Sun
Full Sun (6-8 hours)
Water
Moderate
Spacing
18" apart
Depth
0.25" deep
Height
24-36"
Germination
7-14 days
Ready to Grow Serrano Pepper?
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Seed Saving Guide
ModerateWhen to Harvest Seed
Allow peppers to fully ripen red on the plant.
Processing
Remove seeds carefully — serrano is quite hot. Dry flat for 1–2 weeks. Gloves recommended.
Seed Viability
Up to 2 years when stored cool, dark, and dry.
Pro Tip
C. annuum — crosses freely with other annuum peppers. Isolate by 300 feet for pure seed.
Seed Storage Supplies
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Raised Bed Planting Guides
A 4×8 bed fits 14 plants of Serrano Pepper. See plant counts, spacing grids, and companion pairings for every bed size →
Serrano Pepper Planting Calendar by Zone
Serrano Pepper Planting Calendar by State
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Frequently Asked Questions
When should I plant Serrano Pepper? +
Start Serrano Pepper seeds indoors 10 weeks before your last frost date, then transplant outdoors 2 weeks after the last frost. Use the search on this page to find exact dates for your ZIP code or city.
How long does Serrano Pepper take to grow? +
Serrano Pepper typically matures in about 80 days from planting. Exact timing varies by variety, soil conditions, and local climate.
Should I start Serrano Pepper indoors or direct sow? +
Serrano Pepper should be started indoors 10 weeks before the last frost date. This gives seedlings time to establish before being transplanted outside after frost danger has passed.
How much sun does Serrano Pepper need? +
Serrano Pepper requires full sun (6-8 hours) to thrive.
How far apart should I plant Serrano Pepper? +
Space Serrano Pepper plants 18 inches apart to allow adequate airflow and root development.
How much water does Serrano Pepper need? +
Serrano Pepper has moderate water needs. Consistent moisture is important especially during germination and early growth.
Can you save seeds from Serrano Pepper? +
Yes — seed saving difficulty for Serrano Pepper is rated moderate. Allow peppers to fully ripen red on the plant. Remove seeds carefully — serrano is quite hot. Dry flat for 1–2 weeks. Gloves recommended.
How long do Serrano Pepper seeds last in storage? +
Properly dried and stored Serrano Pepper seeds remain viable for up to 2 years. Store in a cool, dark, dry location in an airtight container with a silica gel packet for best results.
Are Serrano Pepper seeds open-pollinated? +
Yes — Serrano Pepper is open-pollinated, meaning seeds saved from your harvest will grow plants true to the parent variety. This makes it an excellent candidate for building a self-sustaining garden.
About Serrano Pepper
Thin-walled, hot pepper (10,000-23,000 Scoville) popular in Mexican cuisine. Hotter than jalapeños. Use green or red ripe.
Expect your Serrano Pepper to be ready for harvest in approximately 80 days from planting.
Use the search above or browse by zone or state to find the perfect planting dates for your location.