Read your county's frost-date table as a regional anchor, then adjust for your specific microclimate. The page includes a microclimate explanation.
Frost Dates & Planting Timing
How much does frost date vary within a county?
Local frost dates can vary by 2-4 weeks within a single county, driven by elevation, slope aspect, cold air drainage, and proximity to water. Valley bottoms frost earlier in fall and later in spring than nearby hilltops. Urban areas frost weeks later than nearby rural sites.
More from Frost Dates & Planting Timing
- When is the last frost date in my area?
- What is the difference between a hardiness zone and a frost date?
- What does 50% frost probability mean?
- When is it safe to plant tomatoes outside?
- How do I use frost probability tables for planting decisions?
- What is a killing frost vs. a light frost?
- Can I plant earlier using row cover?
- How do I protect plants from a late spring frost?
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