Vista, CA Frost Dates
Published: February 1, 2026 · Updated: April 23, 2026
USDA Zone 7b
Last Spring Frost
March 1
Safe to transplant after this date
First Fall Frost
November 22
Protect tender plants before this date
Frost-Free Season
266 days
Early March to Early December
275 days until last frost in Vista — March 1
Vista’s zone 7b climate provides a generous 266-day frost-free window — long enough for a wide variety of vegetables and excellent conditions for both cool-season and warm-season lawn grasses.
Complete Planting Calendar for Vista
Lawn Care Timing for Vista
Based on Vista's USDA zone 7b frost dates: The last frost of March 1 marks when warm-season grasses begin recovering. Apply spring fertilizer in Early March when soil reaches 55°F. The first fall frost of November 22 sets your deadlines — complete overseeding by October 1–November 1 and apply winterizer by Early December.
USDA Zone 7b Summary
Almost 9 months frost-free. Warm-season grasses thrive. Brief winter dormancy only.
Frequently Asked Questions
What is the last frost date in Vista, CA?
The average last spring frost in Vista is March 1. This is based on USDA zone 7b historical averages. Plan transplanting and spring lawn care around this date — wait 2 weeks after for frost-sensitive plantings.
When is the first fall frost in Vista?
Vista’s average first fall frost is November 22. This sets deadlines for fall overseeding (must be done 6 weeks before) and winterizer application (by Early December).
When should I plant tomatoes in Vista?
Transplant tomato seedlings outdoors after March 1. Start seeds indoors Early December. Direct sow warm-season crops after march 10.
When should I overseed my lawn in Vista?
The prime overseeding window in Vista is October 1–November 1. This ensures warm soil for germination before the first fall frost on November 22.
When should I apply winterizer in Vista?
Apply winterizer fertilizer in Vista by Early December. This high-potassium application hardens grass cell walls before freeze damage. Your first fall frost of November 22 is the hard deadline.