When to plant in Collegedale, TN
USDA Zone 8aEverything below — frost dates, hardiness zone, and what to plant when in Collegedale, Tennessee — is derived from the closest NOAA station with complete climate normals.
Zone 8a means many perennials and even some tender shrubs overwinter in Collegedale, while your frost dates still decide when annuals go out.
The average last spring frost in Collegedale is now 7 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
CHATTANOOGA LOVELL AP · 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 Collegedale’s own odds, recorded at CHATTANOOGA LOVELL AP.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | Apr 20 | Apr 4 | Mar 19 | Oct 19 | Oct 31 | Nov 11 |
| 32°F | Apr 8 | Mar 24 | Mar 6 | Oct 27 | Nov 9 | Nov 26 |
| 28°F | Mar 30 | Mar 11 | Feb 18 | Nov 6 | Nov 22 | Dec 13 |
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 Collegedale, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 27 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.
Collegedale planting FAQ
When is the last spring frost in Collegedale, TN?
On average, the last spring frost in Collegedale is around March 24 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Collegedale, TN?
Expect Collegedale's first fall frost near November 9 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Collegedale in?
Collegedale is in USDA hardiness zone 8a. In zone 8a, winters are mild — many tender perennials overwinter here.
How long is the growing season in Collegedale?
There are roughly 230 frost-free days in Collegedale (a long growing season), running from the average last frost around March 24 to the first fall frost near November 9.
When should I plant tomatoes in Collegedale?
In Collegedale, start tomato seeds indoors around January 27–February 10, then transplant seedlings outdoors around March 31 once the danger of frost has passed.
Never miss a window in Collegedale
An email when it’s time to start seeds, transplant, and sow — timed to Collegedale’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- East Ridge · 18 km
- Chattanooga · 18 km
- Middle Valley · 20 km
- Cleveland · 21 km
- Fort Oglethorpe · 23 km
- Red Bank · 23 km
- Soddy-Daisy · 26 km
- Dalton · 32 km
Frost dates recorded at CHATTANOOGA LOVELL AP, 14 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 Collegedale, TN — Frost Dates & Zone 8a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USW00013882. Retrieved from https://blissgarden.com/tennessee/collegedale.