Glossary
TimingLast Frost Date
Simple meaning
A last frost date is the estimated spring date after which frost risk usually drops enough for warm-season planting.
Remember this
One warm week does not mean cold nights are finished.
Quick sketch
Risk drops gradually
The date helps. It does not mean cold has packed up for the year.
Use this in a planting plan
Your last frost date helps estimate when to start seeds, transplant outdoors, and direct sow frost-sensitive crops.
Open Planting Date CalculatorWhen this term matters
Last frost date shows up every spring, usually right after a warm afternoon makes everyone want to plant tomatoes too early.
A warm week does not mean warm soil. It also does not mean basil, peppers, tomatoes, or cucumbers are ready for cold nights.
How to use this idea
Gardeners use last frost dates to time indoor seed starting, transplanting, and direct sowing. It is an estimate, not a guarantee, so local weather still matters.
Transplants
Tender seedlings can sit there sulking after one cold night.
Direct sowing
Peas and radishes may be fine while basil is absolutely not.
Soil warmth
The air can feel like spring while the bed still feels like March.
Common mistake
A warm week before the last frost date does not guarantee warm soil or safe overnight temperatures.
Real-bed example
A raised bed may be workable before the lawn dries out, but basil, peppers, tomatoes, and cucumbers can still stall if nights stay cold.
Raised bed note: Raised beds may warm earlier than the ground around them, but basil, peppers, tomatoes, and cucumbers can still get set back by cold nights.
Related terms
Common question
Can I plant before my last frost date?
Cold-tolerant crops may be planted before the last frost date, but warm-season crops usually need protection or should wait.