Puerto Rico Frost Dates
Published: February 1, 2026 · Updated: April 23, 2026
Last Spring Frost
Frost-free
Zone 10b
First Fall Frost
Frost-free
Zone 10b
Frost-Free Season
365 days
Year-round to Year-round
Lawn Care Timing for Puerto Rico
Vegetable Garden Timing for Puerto Rico
Frost Dates by City in Puerto Rico
Frequently Asked Questions
What is the last frost date in Puerto Rico?
The average last spring frost in Puerto Rico (zone 10b) is Frost-free. Dates vary by city and elevation. Find your specific city below for exact dates.
When is it safe to plant tomatoes in Puerto Rico?
Transplant tomato seedlings outdoors after Frost-free — the average last frost date for zone 10b. Start seeds indoors Year-round. Wait 2 weeks after last frost for extra safety.
When should I overseed my lawn in Puerto Rico?
The prime overseeding window in Puerto Rico is October–November. This ensures 6 weeks of warm soil for germination before the first fall frost on Frost-free.
When should I apply winteriser in Puerto Rico?
Apply winteriser fertiliser by Not applicable. Your first fall frost of Frost-free is the hard deadline — apply at least 2–3 weeks before.
What USDA zone is Puerto Rico?
Puerto Rico contains USDA zones 10b. Each zone has different frost dates and growing seasons. Find your city below for your specific zone.