Frost dates for 37848Powder Springs, TN
The average last spring frost in Powder Springs is March 31 and the average first fall frost is November 4, giving a typical growing season of about 217 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 31
- Average first fall frost
- Nov 4
- Growing season
- 217 days
Safer after Apr 18 (1-in-10 risk)
Possible by Oct 22 (1-in-10 risk)
First frost typically in 1 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Mar 29 · Apr 14 · May 2 | Oct 13 · Oct 26 · Nov 7 | 195 days | 100% |
| Frost / freeze (32°F) | Mar 14 · Mar 31 · Apr 18 | Oct 22 · Nov 4 · Nov 18 | 217 days | 100% |
| Hard freeze (28°F) | Mar 2 · Mar 21 · Apr 5 | Nov 1 · Nov 14 · Dec 2 | 240 days | 100% |
Planting calendar for Powder Springs
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Feb 28 – May 6 |
| Tomatoes | Transplant outdoors | Apr 16 – Jul 15 |
| Peppers | Start seeds indoors | Feb 28 – Mar 31 |
| Peppers | Transplant outdoors | Apr 30 – May 31 |
| Eggplant | Start seeds indoors | Mar 17 – Apr 15 |
| Eggplant | Transplant outdoors | Apr 30 – May 31 |
| Cucumbers | Sow outdoors | Apr 30 – Jul 25 |
| Summer squash | Sow outdoors | Apr 16 – May 31 |
| Winter squash & pumpkins | Sow outdoors | Apr 30 – May 31 |
| Snap beans | Sow outdoors | Apr 16 – Aug 17 |
| Sweet corn | Sow outdoors | Apr 16 – Jul 15 |
| Watermelon & cantaloupe | Sow outdoors | Apr 30 – May 31 |
| Okra | Sow outdoors | Apr 23 – May 16 |
| Peas | Sow outdoors (spring) | Feb 28 – Apr 15 |
| Potatoes | Plant outdoors (spring) | Feb 28 – Apr 30 |
| Onions | Start seeds indoors (spring) | Jan 17 – Feb 13 |
| Onions | Transplant outdoors (spring) | Mar 17 – Apr 15 |
| Broccoli | Start seeds indoors (spring) | Feb 10 – Mar 16 |
| Broccoli | Transplant outdoors (spring) | Mar 17 – Apr 15 |
| Broccoli | Start seeds indoors (fall) | Jul 5 – Jul 15 |
| Broccoli | Transplant outdoors (fall) | Aug 4 – Aug 15 |
| Cabbage | Start seeds indoors (spring) | Jan 31 – Feb 28 |
| Cabbage | Transplant outdoors (spring) | Feb 28 – Mar 31 |
| Cabbage | Start seeds indoors (fall) | Jun 25 – Jul 25 |
| Cabbage | Transplant outdoors (fall) | Jul 25 – Aug 25 |
| Leaf lettuce | Sow outdoors (spring) | Feb 28 – May 16 |
| Leaf lettuce | Sow outdoors (fall) | Jul 25 – Sep 10 |
| Spinach | Sow outdoors (spring) | Feb 21 – Apr 6 |
| Spinach | Sow outdoors (fall) | Aug 11 – Sep 15 |
| Radishes | Sow outdoors (spring) | Feb 28 – Apr 20 |
| Radishes | Sow outdoors (fall) | Jul 25 – Sep 25 |
| Kale | Sow outdoors (spring) | Mar 17 – Apr 6 |
| Kale | Sow outdoors (fall) | Jul 18 – Aug 25 |
| Carrots | Sow outdoors (spring) | Mar 31 – May 16 |
| Carrots | Sow outdoors (fall) | Jun 25 – Aug 10 |
| Garlic | Plant outdoors (fall) | Oct 25 – Nov 25 |
Where these dates come from
ZIP code 37848 is matched to the NOAA station Morristown Wfo, TN, 26 km away, at 1,320 ft elevation (31 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Morristown Wfo, TN (used) | 1,320 ft | Mar 31 | Nov 4 |
| Jefferson City, TN | 1,108 ft | Apr 24 | Oct 17 |
| Tazewell, TN | 1,365 ft | Apr 23 | Oct 19 |
| Morristown Radio Wcrk, TN | 1,344 ft | Apr 10 | Oct 28 |
Frost dates near Powder Springs
- Luttrell, TN 37779 · last Apr 22, first Oct 25
- Blaine, TN 37709 · last Apr 24, first Oct 17
- Washburn, TN 37888 · last Apr 23, first Oct 19
- Maynardville, TN 37807 · last Apr 22, first Oct 25
- Rutledge, TN 37861 · last Mar 31, first Nov 4
- Corryton, TN 37721 · last Apr 22, first Oct 25
- Mascot, TN 37806 · last Apr 24, first Oct 17
- Strawberry Plains, TN 37871 · last Apr 6, first Oct 29
Frequently asked questions
- When is the last frost in Powder Springs, TN?
- For ZIP code 37848, the average last spring frost (32°F) is March 31, based on NOAA 1991-2020 climate normals for the Morristown Wfo, TN weather station. There is a 1-in-10 chance of a frost after April 18.
- When is the first frost in Powder Springs, TN?
- The average first fall frost (32°F) is November 4. There is a 1-in-10 chance of frost by October 22, so tender plants are at risk from that point on.
- How long is the growing season in 37848?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 217 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.