When to plant in Jeffersontown, KY
USDA Zone 7aEverything below — frost dates, hardiness zone, and what to plant when in Jeffersontown, Kentucky — is derived from the closest NOAA station with complete climate normals.
Zone 7a means many perennials and even some tender shrubs overwinter in Jeffersontown, while your frost dates still decide when annuals go out.
Frost probability
LOUISVILLE BOWMAN FLD · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Jeffersontown’s own odds, recorded at LOUISVILLE BOWMAN FLD.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 3 | Apr 16 | Apr 2 | Oct 12 | Oct 23 | Nov 3 |
| 32°F | Apr 19 | Apr 3 | Mar 18 | Oct 21 | Nov 3 | Nov 16 |
| 28°F | Apr 5 | Mar 22 | Mar 4 | Nov 1 | Nov 13 | Dec 1 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Jeffersontown, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 15 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Jeffersontown planting FAQ
When is the last spring frost in Jeffersontown, KY?
Plan for the last spring frost in Jeffersontown around April 3 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Jeffersontown, KY?
Expect Jeffersontown's first fall frost near November 3 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Jeffersontown in?
Jeffersontown is in USDA hardiness zone 7a. In zone 7a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Jeffersontown?
There are roughly 214 frost-free days in Jeffersontown (a long growing season), running from the average last frost around April 3 to the first fall frost near November 3.
When should I plant tomatoes in Jeffersontown?
In Jeffersontown, start tomato seeds indoors around February 6–February 20, then transplant seedlings outdoors around April 10 once the danger of frost has passed.
Never miss a window in Jeffersontown
An email when it’s time to start seeds, transplant, and sow — timed to Jeffersontown’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Lyndon · 7 km
- St. Matthews · 8 km
- Louisville/Jefferson County metro government · 8 km
- Mount Washington · 18 km
- Jeffersonville · 19 km
- Shively · 21 km
- Clarksville · 22 km
- New Albany · 25 km
Frost dates recorded at LOUISVILLE BOWMAN FLD, 9 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Jeffersontown, KY — Frost Dates & Zone 7a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00013810. Retrieved from https://blissgarden.com/kentucky/jeffersontown.