Frost Dates for Warrington, PA 18976
Last spring frost April 22 · First fall frost October 18 · 179 frost-free days · USDA Zone 7a
ZIP 18976 has about 22,200 people.
Moderate season: 179 frost-free days. Spring frost risk spans April 10–May 3 (23 days). Fall frost risk spans September 30–November 5 (36 days).
Frost probability for 18976
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 3 | April 22 | April 10 |
| Fall (first frost) | September 30 | October 18 | November 5 |
Dates come from NOAA 1971–2000 freeze probabilities at NESHAMINY FALLS (19.5 km away); the 50% date is the median year.
Which crops fit a 179-day season in Warrington
In Warrington (179 frost-free days, a moderate season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Mar 18 | May 6–May 13 | 137 | fits: 80 days to maturity, 137 available after May 6. | Jun 18 |
| Pepper | Mar 11 | May 6–May 13 | 137 | fits: 75 days to maturity, 137 available after May 6. | Jun 23 |
| Lettuce | Feb 25 | Mar 25–Apr 1 | 214 | two-plantings: Plant Mar 25 and again by Aug 27; both mature before Oct 25. | Aug 27 |
| Carrots | — | Apr 1–Apr 8 | 221 | fits: 70 days to maturity, 221 available after Apr 1. | Aug 16 |
| Cucumber | Apr 1 | May 6–May 13 | 151 | two-plantings: Plant May 6 and again by Jul 22; both mature before Oct 4. | Jul 22 |
| Beans | — | Apr 29–May 13 | 165 | two-plantings: Plant Apr 29 and again by Jul 29; both mature before Oct 11. | Jul 29 |
| Peas | — | Feb 25–May 6 | 242 | fits: 65 days to maturity, 242 available after Feb 25. | Aug 7 |
| Zucchini | Apr 8 | May 6–May 13 | 151 | two-plantings: Plant May 6 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Onion | Jan 28 | Mar 25–Apr 8 | 214 | fits: 100 days to maturity, 214 available after Mar 25. | — |
| Spinach | — | Feb 25–Apr 15 | 256 | two-plantings: Plant Feb 25 and again by Sep 15; both mature before Nov 8. | Sep 15 |
| Kale | Feb 11 | Mar 25–Apr 8 | 228 | two-plantings: Plant Mar 25 and again by Aug 31; both mature before Nov 8. | Aug 31 |
| Broccoli | Feb 25 | Mar 25–Apr 8 | 214 | fits: 80 days to maturity, 214 available after Mar 25. | Jul 23 |
| Cabbage | Feb 25 | Mar 25–Apr 8 | 228 | fits: 70 days to maturity, 228 available after Mar 25. | Aug 16 |
| Radish | — | Feb 25–May 20 | 242 | two-plantings: Plant Feb 25 and again by Sep 16; both mature before Oct 25. | Sep 16 |
| Beets | — | Feb 25–May 20 | 242 | two-plantings: Plant Feb 25 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Potatoes | — | Apr 8–Apr 15 | 200 | fits: 90 days to maturity, 200 available after Apr 8. | — |
| Garlic | — | Oct 18 | 284 | overwinter: Plant Oct 18 to Nov 8; harvest the following summer. | Nov 8 |
| Strawberry | — | Mar 18–May 13 | 235 | perennial: A perennial: plant Mar 18; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 25 | Apr 29–May 6 | 151 | fits: 75 days to maturity, 151 available after Apr 29. | Jun 30 |
| Pumpkin | Apr 8 | May 6–May 6 | 144 | fits: 100 days to maturity, 144 available after May 6. | Jun 5 |
| Cauliflower | Mar 11 | Apr 15–Apr 29 | 193 | fits: 75 days to maturity, 193 available after Apr 15. | Jul 28 |
| Swiss Chard | Feb 25 | Apr 8–Apr 8 | 200 | two-plantings: Plant Apr 8 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Arugula | — | Feb 25–May 20 | 256 | two-plantings: Plant Feb 25 and again by Sep 15; both mature before Nov 8. | Sep 15 |
| Brussel Sprouts | Feb 25 | Mar 25–Apr 8 | 228 | fits: 100 days to maturity, 228 available after Mar 25. | Jul 17 |
| Butternut Squash | Apr 8 | May 6–May 13 | 144 | fits: 100 days to maturity, 144 available after May 6. | Jun 5 |
| Eggplant | Mar 4 | May 6–May 13 | 137 | fits: 70 days to maturity, 137 available after May 6. | Jun 28 |
| Okra | Mar 25 | Apr 29–May 6 | 158 | two-plantings: Plant Apr 29 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Basil | Mar 18 | May 13–May 13 | 144 | two-plantings: Plant May 13 and again by Jul 22; both mature before Oct 4. | Jul 22 |
| Cilantro | — | Mar 25–Apr 15 | 214 | two-plantings: Plant Mar 25 and again by Aug 22; both mature before Oct 25. | Aug 22 |
| Parsley | Feb 11 | Apr 29–May 6 | 179 | fits: 70 days to maturity, 179 available after Apr 29. | Aug 2 |
| Celery | Feb 11 | Apr 29–May 13 | 179 | fits: 120 days to maturity, 179 available after Apr 29. | Jun 13 |
| Scallions | Feb 11 | Mar 25–Apr 8 | 228 | two-plantings: Plant Mar 25 and again by Aug 26; both mature before Nov 8. | Aug 26 |
| Turnip | — | Mar 25–Apr 8 | 228 | two-plantings: Plant Mar 25 and again by Sep 5; both mature before Nov 8. | Sep 5 |
| Kohlrabi | — | Mar 11–Mar 25 | 242 | two-plantings: Plant Mar 11 and again by Aug 31; both mature before Nov 8. | Aug 31 |
| Bok Choy | Mar 25 | Apr 15–Apr 22 | 193 | two-plantings: Plant Apr 15 and again by Aug 27; both mature before Oct 25. | Aug 27 |
| Collards | Feb 11 | Mar 25–Apr 8 | 228 | two-plantings: Plant Mar 25 and again by Aug 26; both mature before Nov 8. | Aug 26 |
| Cantaloupe | Apr 8 | May 6–May 13 | 137 | fits: 85 days to maturity, 137 available after May 6. | Jun 13 |
| Chives | Jan 28 | Apr 29–May 6 | 193 | fits: 90 days to maturity, 193 available after Apr 29. | — |
| Dill | — | Feb 25–May 20 | 242 | two-plantings: Plant Feb 25 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Oregano | Feb 11 | Apr 29–May 6 | 193 | fits: 80 days to maturity, 193 available after Apr 29. | — |
| Rosemary | Jan 28 | Apr 29–May 6 | 179 | fits: 80 days to maturity, 179 available after Apr 29. | — |
| Sage | Feb 25 | Apr 29–May 6 | 193 | fits: 75 days to maturity, 193 available after Apr 29. | — |
| Thyme | Feb 11 | Apr 29–May 6 | 193 | fits: 90 days to maturity, 193 available after Apr 29. | — |
| Calendula | Mar 11 | Apr 8–Apr 22 | 200 | two-plantings: Plant Apr 8 and again by Aug 22; both mature before Oct 25. | Aug 22 |
| Cosmos | Mar 25 | Apr 22–May 6 | 165 | two-plantings: Plant Apr 22 and again by Jul 22; both mature before Oct 4. | Jul 22 |
| Lavender | Jan 28 | Apr 22–May 6 | 200 | fits: 90 days to maturity, 200 available after Apr 22. | — |
| Marigolds | Mar 11 | Apr 22–Apr 29 | 165 | two-plantings: Plant Apr 22 and again by Aug 1; both mature before Oct 4. | Aug 1 |
| Melons | Apr 8 | May 6–May 13 | 137 | fits: 85 days to maturity, 137 available after May 6. | Jun 13 |
| Mint | — | Apr 22–May 6 | 200 | fits: 90 days to maturity, 200 available after Apr 22. | — |
| Nasturtiums | Mar 25 | Apr 22–Apr 29 | 165 | two-plantings: Plant Apr 22 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Pole Beans | — | Apr 29–May 13 | 158 | fits: 65 days to maturity, 158 available after Apr 29. | Jul 17 |
| Spaghetti Squash | Apr 8 | May 6–May 13 | 144 | fits: 90 days to maturity, 144 available after May 6. | Jun 15 |
| Sunflowers | — | Apr 22–May 6 | 165 | fits: 70 days to maturity, 165 available after Apr 22. | Jul 12 |
| Tomatillos | Feb 25 | Apr 29–May 6 | 144 | fits: 75 days to maturity, 144 available after Apr 29. | Jun 23 |
| Watermelon | Apr 8 | Apr 29–May 6 | 144 | fits: 80 days to maturity, 144 available after Apr 29. | Jun 18 |
| Yellow Squash | Apr 8 | May 6–May 13 | 151 | two-plantings: Plant May 6 and again by Jul 27; both mature before Oct 4. | Jul 27 |
| Zinnias | Mar 25 | Apr 22–May 6 | 165 | two-plantings: Plant Apr 22 and again by Jul 22; both mature before Oct 4. | Jul 22 |
Month by month in Warrington
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 28), Lavender (Jan 28), Onion (Jan 28), Rosemary (Jan 28). |
| February | Start indoors: Celery (Feb 11), Collards (Feb 11), Kale (Feb 11), Oregano (Feb 11), Parsley (Feb 11), Scallions (Feb 11), +8 more. Direct sow from: Arugula (Feb 25), Beets (Feb 25), Dill (Feb 25), Peas (Feb 25), Radish (Feb 25), Spinach (Feb 25). |
| March | Start indoors: Eggplant (Mar 4), Calendula (Mar 11), Cauliflower (Mar 11), Marigolds (Mar 11), Pepper (Mar 11), Basil (Mar 18), +7 more. Direct sow from: Kohlrabi (Mar 11), Cilantro (Mar 25), Turnip (Mar 25). Transplant from: Broccoli (Mar 25), Brussel Sprouts (Mar 25), Cabbage (Mar 25), Collards (Mar 25), Kale (Mar 25), Lettuce (Mar 25), +2 more. Plant: Strawberry (Mar 18). |
| April | Start indoors: Cucumber (Apr 1), Butternut Squash (Apr 8), Cantaloupe (Apr 8), Melons (Apr 8), Pumpkin (Apr 8), Spaghetti Squash (Apr 8), +3 more. Direct sow from: Carrots (Apr 1), Potatoes (Apr 8), Sunflowers (Apr 22), Beans (Apr 29), Pole Beans (Apr 29). Transplant from: Calendula (Apr 8), Swiss Chard (Apr 8), Bok Choy (Apr 15), Cauliflower (Apr 15), Cosmos (Apr 22), Lavender (Apr 22), +15 more. Last frost around April 22. |
| May | Transplant from: Butternut Squash (May 6), Cantaloupe (May 6), Cucumber (May 6), Eggplant (May 6), Melons (May 6), Pepper (May 6), +6 more. |
| June | Last sowing dates: Butternut Squash (Jun 5), Pumpkin (Jun 5), Cantaloupe (Jun 13), Celery (Jun 13), Melons (Jun 13), Spaghetti Squash (Jun 15), +6 more. |
| July | Last sowing dates: Sunflowers (Jul 12), Brussel Sprouts (Jul 17), Pole Beans (Jul 17), Basil (Jul 22), Cosmos (Jul 22), Cucumber (Jul 22), +8 more. |
| August | Last sowing dates: Marigolds (Aug 1), Parsley (Aug 2), Peas (Aug 7), Cabbage (Aug 16), Carrots (Aug 16), Beets (Aug 17), +10 more. |
| September | Last sowing dates: Turnip (Sep 5), Arugula (Sep 15), Spinach (Sep 15), Radish (Sep 16). |
| October | Direct sow from: Garlic (Oct 18). First frost around October 18. |
| November | Last sowing dates: Garlic (Nov 8). |
| December | Clean up spent plants. Add compost to beds. Rest, review, and plan next year's garden. |
Frequently Asked Questions
What is the last frost date for Warrington, PA (ZIP 18976)?
The median last spring frost date for Warrington, PA (ZIP code 18976) is around April 22. This is the 50th-percentile date — meaning half of all years see frost end before this date. Use the 10% and 90% dates to understand the full range of risk in your area. One year in ten frost ends before April 10; one in ten it runs past May 3.
What is the first fall frost date in Warrington, PA?
The median first fall frost date for Warrington, PA is around October 18. Plan to harvest or protect frost-sensitive crops like tomatoes and peppers at least a week before this date to avoid losses. The first frost arrives around September 30 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Warrington, PA?
The frost-free growing season in Warrington is about 179 days. This window — from your last spring frost to your first fall frost — is when warm-season vegetables thrive. Cold-hardy crops like kale, spinach, and peas can extend your season by weeks on either side. In Warrington (179 frost-free days, a moderate season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Warrington, PA?
Warrington, PA is in USDA hardiness zone 7a (2023 USDA Plant Hardiness Zone Map). Zones come from the average coldest winter temperature, so they tell you which perennials survive the winter; the frost dates on this page tell you when to plant.
When should I start tomatoes indoors in Warrington, PA?
Start tomatoes indoors Mar 18 and plant out May 6 in Warrington. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Warrington?
Two: plant Mar 25 and again by Aug 27; both mature before Oct 25.
When do I plant garlic in Warrington?
Oct 18 to Nov 8; it overwinters and is ready the following summer.
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