Frost dates for 08012Blackwood, NJ
The average last spring frost in Blackwood is April 12 and the average first fall frost is November 1, giving a typical growing season of about 200 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 12
- Average first fall frost
- Nov 1
- Growing season
- 200 days
Safer after May 3 (1-in-10 risk)
Possible by Oct 17 (1-in-10 risk)
Last frost typically in 160 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) | Apr 10 · Apr 29 · May 16 | Oct 5 · Oct 19 · Nov 2 | 172 days | 100% |
| Frost / freeze (32°F) | Mar 28 · Apr 12 · May 3 | Oct 17 · Nov 1 · Nov 14 | 200 days | 100% |
| Hard freeze (28°F) | Mar 13 · Mar 29 · Apr 16 | Oct 31 · Nov 12 · Nov 30 | 228 days | 100% |
Planting calendar for Blackwood
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 | Mar 12 – May 18 |
| Tomatoes | Transplant outdoors | Apr 28 – Jul 12 |
| Peppers | Start seeds indoors | Mar 12 – Apr 12 |
| Peppers | Transplant outdoors | May 12 – Jun 12 |
| Eggplant | Start seeds indoors | Mar 29 – Apr 27 |
| Eggplant | Transplant outdoors | May 12 – Jun 12 |
| Cucumbers | Sow outdoors | May 12 – Jul 22 |
| Summer squash | Sow outdoors | Apr 28 – Jun 12 |
| Winter squash & pumpkins | Sow outdoors | May 12 – Jun 12 |
| Snap beans | Sow outdoors | Apr 28 – Aug 14 |
| Sweet corn | Sow outdoors | Apr 28 – Jul 12 |
| Watermelon & cantaloupe | Sow outdoors | May 12 – Jun 12 |
| Okra | Sow outdoors | May 5 – May 28 |
| Peas | Sow outdoors (spring) | Mar 12 – Apr 27 |
| Potatoes | Plant outdoors (spring) | Mar 12 – May 12 |
| Onions | Start seeds indoors (spring) | Jan 29 – Feb 25 |
| Onions | Transplant outdoors (spring) | Mar 29 – Apr 27 |
| Broccoli | Start seeds indoors (spring) | Feb 22 – Mar 28 |
| Broccoli | Transplant outdoors (spring) | Mar 29 – Apr 27 |
| Broccoli | Start seeds indoors (fall) | Jul 2 – Jul 12 |
| Broccoli | Transplant outdoors (fall) | Aug 1 – Aug 12 |
| Cabbage | Start seeds indoors (spring) | Feb 12 – Mar 12 |
| Cabbage | Transplant outdoors (spring) | Mar 12 – Apr 12 |
| Cabbage | Start seeds indoors (fall) | Jun 22 – Jul 22 |
| Cabbage | Transplant outdoors (fall) | Jul 22 – Aug 22 |
| Leaf lettuce | Sow outdoors (spring) | Mar 12 – May 28 |
| Leaf lettuce | Sow outdoors (fall) | Jul 22 – Sep 7 |
| Spinach | Sow outdoors (spring) | Mar 5 – Apr 18 |
| Spinach | Sow outdoors (fall) | Aug 8 – Sep 12 |
| Radishes | Sow outdoors (spring) | Mar 12 – May 2 |
| Radishes | Sow outdoors (fall) | Jul 22 – Sep 22 |
| Kale | Sow outdoors (spring) | Mar 29 – Apr 18 |
| Kale | Sow outdoors (fall) | Jul 15 – Aug 22 |
| Carrots | Sow outdoors (spring) | Apr 12 – May 28 |
| Carrots | Sow outdoors (fall) | Jun 22 – Aug 7 |
| Garlic | Plant outdoors (fall) | Oct 22 – Nov 22 |
Where these dates come from
ZIP code 08012 is matched to the NOAA station Moorestown, NJ, 18.8 km away, at 45 ft elevation (44 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Moorestown, NJ (used) | 45 ft | Apr 12 | Nov 1 |
| Glassboro 2 Ne, NJ | 100 ft | Apr 8 | Nov 1 |
| Philadelphia Intl Ap, PA | 10 ft | Apr 2 | Nov 10 |
| Pennsauken 1N, NJ | 46 ft | Apr 15 | Oct 31 |
Frost dates near Blackwood
- Grenloch, NJ 08032 · last Apr 2, first Nov 10
- Clementon, NJ 08021 · last Apr 12, first Nov 1
- Stratford, NJ 08084 · last Apr 12, first Nov 1
- Deptford, NJ 08096 · last Apr 28, first Oct 15
- Somerdale, NJ 08083 · last Apr 12, first Nov 1
- Glendora, NJ 08029 · last Apr 15, first Oct 31
- Sewell, NJ 08080 · last Apr 8, first Nov 1
- Magnolia, NJ 08049 · last Apr 12, first Nov 1
Frequently asked questions
- When is the last frost in Blackwood, NJ?
- For ZIP code 08012, the average last spring frost (32°F) is April 12, based on NOAA 1991-2020 climate normals for the Moorestown, NJ weather station. There is a 1-in-10 chance of a frost after May 3.
- When is the first frost in Blackwood, NJ?
- The average first fall frost (32°F) is November 1. There is a 1-in-10 chance of frost by October 17, so tender plants are at risk from that point on.
- How long is the growing season in 08012?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 200 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.