Frost Dates for Islip, NY 11751
Last spring frost April 11 · First fall frost November 4 · 207 frost-free days · USDA Zone 7b
ZIP 11751 has about 13,700 people.
Long season: 207 frost-free days. Spring frost risk spans March 29–April 23 (25 days). Fall frost risk spans October 19–November 19 (31 days).
Frost probability for 11751
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | April 23 | April 11 | March 29 |
| Fall (first frost) | October 19 | November 4 | November 19 |
Dates come from NOAA 1971–2000 freeze probabilities at IGOR I SIKORSKY MEM AP (48.8 km away); the 50% date is the median year.
Which crops fit a 207-day season in Islip
In Islip (207 frost-free days, a long 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 7 | Apr 25–May 2 | 165 | fits: 80 days to maturity, 165 available after Apr 25. | Jul 5 |
| Pepper | Feb 28 | Apr 25–May 2 | 165 | fits: 75 days to maturity, 165 available after Apr 25. | Jul 10 |
| Lettuce | Feb 14 | Mar 14–Mar 21 | 242 | two-plantings: Plant Mar 14 and again by Sep 13; both mature before Nov 11. | Sep 13 |
| Carrots | — | Mar 21–Mar 28 | 249 | fits: 70 days to maturity, 249 available after Mar 21. | Sep 2 |
| Cucumber | Mar 21 | Apr 25–May 2 | 179 | two-plantings: Plant Apr 25 and again by Aug 8; both mature before Oct 21. | Aug 8 |
| Beans | — | Apr 18–May 2 | 193 | two-plantings: Plant Apr 18 and again by Aug 15; both mature before Oct 28. | Aug 15 |
| Peas | — | Feb 14–Apr 25 | 270 | fits: 65 days to maturity, 270 available after Feb 14. | Aug 24 |
| Zucchini | Mar 28 | Apr 25–May 2 | 179 | two-plantings: Plant Apr 25 and again by Aug 13; both mature before Oct 21. | Aug 13 |
| Onion | Jan 17 | Mar 14–Mar 28 | 242 | fits: 100 days to maturity, 242 available after Mar 14. | — |
| Spinach | — | Feb 14–Apr 4 | 284 | two-plantings: Plant Feb 14 and again by Oct 2; both mature before Nov 25. | Oct 2 |
| Kale | Jan 31 | Mar 14–Mar 28 | 256 | two-plantings: Plant Mar 14 and again by Sep 17; both mature before Nov 25. | Sep 17 |
| Broccoli | Feb 14 | Mar 14–Mar 28 | 242 | fits: 80 days to maturity, 242 available after Mar 14. | Aug 9 |
| Cabbage | Feb 14 | Mar 14–Mar 28 | 256 | fits: 70 days to maturity, 256 available after Mar 14. | Sep 2 |
| Radish | — | Feb 14–May 9 | 270 | two-plantings: Plant Feb 14 and again by Oct 3; both mature before Nov 11. | Oct 3 |
| Beets | — | Feb 14–May 9 | 270 | two-plantings: Plant Feb 14 and again by Sep 3; both mature before Nov 11. | Sep 3 |
| Potatoes | — | Mar 28–Apr 4 | 228 | fits: 90 days to maturity, 228 available after Mar 28. | — |
| Garlic | — | Nov 4 | 312 | overwinter: Plant Nov 4 to Nov 25; harvest the following summer. | Nov 25 |
| Strawberry | — | Mar 7–May 2 | 263 | perennial: A perennial: plant Mar 7; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 14 | Apr 18–Apr 25 | 179 | fits: 75 days to maturity, 179 available after Apr 18. | Jul 17 |
| Pumpkin | Mar 28 | Apr 25–Apr 25 | 172 | fits: 100 days to maturity, 172 available after Apr 25. | Jun 22 |
| Cauliflower | Feb 28 | Apr 4–Apr 18 | 221 | fits: 75 days to maturity, 221 available after Apr 4. | Aug 14 |
| Swiss Chard | Feb 14 | Mar 28–Mar 28 | 228 | two-plantings: Plant Mar 28 and again by Sep 3; both mature before Nov 11. | Sep 3 |
| Arugula | — | Feb 14–May 9 | 284 | two-plantings: Plant Feb 14 and again by Oct 2; both mature before Nov 25. | Oct 2 |
| Brussel Sprouts | Feb 14 | Mar 14–Mar 28 | 256 | fits: 100 days to maturity, 256 available after Mar 14. | Aug 3 |
| Butternut Squash | Mar 28 | Apr 25–May 2 | 172 | fits: 100 days to maturity, 172 available after Apr 25. | Jun 22 |
| Eggplant | Feb 21 | Apr 25–May 2 | 165 | fits: 70 days to maturity, 165 available after Apr 25. | Jul 15 |
| Okra | Mar 14 | Apr 18–Apr 25 | 186 | two-plantings: Plant Apr 18 and again by Aug 13; both mature before Oct 21. | Aug 13 |
| Basil | Mar 7 | May 2–May 2 | 172 | two-plantings: Plant May 2 and again by Aug 8; both mature before Oct 21. | Aug 8 |
| Cilantro | — | Mar 14–Apr 4 | 242 | two-plantings: Plant Mar 14 and again by Sep 8; both mature before Nov 11. | Sep 8 |
| Parsley | Jan 31 | Apr 18–Apr 25 | 207 | fits: 70 days to maturity, 207 available after Apr 18. | Aug 19 |
| Celery | Jan 31 | Apr 18–May 2 | 207 | fits: 120 days to maturity, 207 available after Apr 18. | Jun 30 |
| Scallions | Jan 31 | Mar 14–Mar 28 | 256 | two-plantings: Plant Mar 14 and again by Sep 12; both mature before Nov 25. | Sep 12 |
| Turnip | — | Mar 14–Mar 28 | 256 | two-plantings: Plant Mar 14 and again by Sep 22; both mature before Nov 25. | Sep 22 |
| Kohlrabi | — | Feb 28–Mar 14 | 270 | two-plantings: Plant Feb 28 and again by Sep 17; both mature before Nov 25. | Sep 17 |
| Bok Choy | Mar 14 | Apr 4–Apr 11 | 221 | two-plantings: Plant Apr 4 and again by Sep 13; both mature before Nov 11. | Sep 13 |
| Collards | Jan 31 | Mar 14–Mar 28 | 256 | two-plantings: Plant Mar 14 and again by Sep 12; both mature before Nov 25. | Sep 12 |
| Cantaloupe | Mar 28 | Apr 25–May 2 | 165 | fits: 85 days to maturity, 165 available after Apr 25. | Jun 30 |
| Chives | Jan 17 | Apr 18–Apr 25 | 221 | fits: 90 days to maturity, 221 available after Apr 18. | — |
| Dill | — | Feb 14–May 9 | 270 | two-plantings: Plant Feb 14 and again by Sep 3; both mature before Nov 11. | Sep 3 |
| Oregano | Jan 31 | Apr 18–Apr 25 | 221 | fits: 80 days to maturity, 221 available after Apr 18. | — |
| Rosemary | Jan 17 | Apr 18–Apr 25 | 207 | fits: 80 days to maturity, 207 available after Apr 18. | — |
| Sage | Feb 14 | Apr 18–Apr 25 | 221 | fits: 75 days to maturity, 221 available after Apr 18. | — |
| Thyme | Jan 31 | Apr 18–Apr 25 | 221 | fits: 90 days to maturity, 221 available after Apr 18. | — |
| Calendula | Feb 28 | Mar 28–Apr 11 | 228 | two-plantings: Plant Mar 28 and again by Sep 8; both mature before Nov 11. | Sep 8 |
| Cosmos | Mar 14 | Apr 11–Apr 25 | 193 | two-plantings: Plant Apr 11 and again by Aug 8; both mature before Oct 21. | Aug 8 |
| Lavender | Jan 17 | Apr 11–Apr 25 | 228 | fits: 90 days to maturity, 228 available after Apr 11. | — |
| Marigolds | Feb 28 | Apr 11–Apr 18 | 193 | two-plantings: Plant Apr 11 and again by Aug 18; both mature before Oct 21. | Aug 18 |
| Melons | Mar 28 | Apr 25–May 2 | 165 | fits: 85 days to maturity, 165 available after Apr 25. | Jun 30 |
| Mint | — | Apr 11–Apr 25 | 228 | fits: 90 days to maturity, 228 available after Apr 11. | — |
| Nasturtiums | Mar 14 | Apr 11–Apr 18 | 193 | two-plantings: Plant Apr 11 and again by Aug 13; both mature before Oct 21. | Aug 13 |
| Pole Beans | — | Apr 18–May 2 | 186 | fits: 65 days to maturity, 186 available after Apr 18. | Aug 3 |
| Spaghetti Squash | Mar 28 | Apr 25–May 2 | 172 | fits: 90 days to maturity, 172 available after Apr 25. | Jul 2 |
| Sunflowers | — | Apr 11–Apr 25 | 193 | fits: 70 days to maturity, 193 available after Apr 11. | Jul 29 |
| Tomatillos | Feb 14 | Apr 18–Apr 25 | 172 | fits: 75 days to maturity, 172 available after Apr 18. | Jul 10 |
| Watermelon | Mar 28 | Apr 18–Apr 25 | 172 | fits: 80 days to maturity, 172 available after Apr 18. | Jul 5 |
| Yellow Squash | Mar 28 | Apr 25–May 2 | 179 | two-plantings: Plant Apr 25 and again by Aug 13; both mature before Oct 21. | Aug 13 |
| Zinnias | Mar 14 | Apr 11–Apr 25 | 193 | two-plantings: Plant Apr 11 and again by Aug 8; both mature before Oct 21. | Aug 8 |
Month by month in Islip
| Month | What to do |
|---|---|
| January | Start indoors: Chives (Jan 17), Lavender (Jan 17), Onion (Jan 17), Rosemary (Jan 17), Celery (Jan 31), Collards (Jan 31), +5 more. |
| February | Start indoors: Broccoli (Feb 14), Brussel Sprouts (Feb 14), Cabbage (Feb 14), Lettuce (Feb 14), Sage (Feb 14), Swiss Chard (Feb 14), +6 more. Direct sow from: Arugula (Feb 14), Beets (Feb 14), Dill (Feb 14), Peas (Feb 14), Radish (Feb 14), Spinach (Feb 14), +1 more. |
| March | Start indoors: Basil (Mar 7), Tomato (Mar 7), Bok Choy (Mar 14), Corn (Mar 14), Cosmos (Mar 14), Nasturtiums (Mar 14), +11 more. Direct sow from: Cilantro (Mar 14), Turnip (Mar 14), Carrots (Mar 21), Potatoes (Mar 28). Transplant from: Broccoli (Mar 14), Brussel Sprouts (Mar 14), Cabbage (Mar 14), Collards (Mar 14), Kale (Mar 14), Lettuce (Mar 14), +4 more. Plant: Strawberry (Mar 7). |
| April | Direct sow from: Sunflowers (Apr 11), Beans (Apr 18), Pole Beans (Apr 18). Transplant from: Bok Choy (Apr 4), Cauliflower (Apr 4), Cosmos (Apr 11), Lavender (Apr 11), Marigolds (Apr 11), Mint (Apr 11), +24 more. Last frost around April 11. |
| May | Transplant from: Basil (May 2). |
| June | Last sowing dates: Butternut Squash (Jun 22), Pumpkin (Jun 22), Cantaloupe (Jun 30), Celery (Jun 30), Melons (Jun 30). |
| July | Last sowing dates: Spaghetti Squash (Jul 2), Tomato (Jul 5), Watermelon (Jul 5), Pepper (Jul 10), Tomatillos (Jul 10), Eggplant (Jul 15), +2 more. |
| August | Last sowing dates: Brussel Sprouts (Aug 3), Pole Beans (Aug 3), Basil (Aug 8), Cosmos (Aug 8), Cucumber (Aug 8), Zinnias (Aug 8), +10 more. |
| September | Last sowing dates: Cabbage (Sep 2), Carrots (Sep 2), Beets (Sep 3), Dill (Sep 3), Swiss Chard (Sep 3), Calendula (Sep 8), +8 more. |
| October | Last sowing dates: Arugula (Oct 2), Spinach (Oct 2), Radish (Oct 3). |
| November | Direct sow from: Garlic (Nov 4). First frost around November 4. Last sowing dates: Garlic (Nov 25). |
| December | Harvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year. |
Frequently Asked Questions
What is the last frost date for Islip, NY (ZIP 11751)?
The median last spring frost date for Islip, NY (ZIP code 11751) is around April 11. 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 March 29; one in ten it runs past April 23.
What is the first fall frost date in Islip, NY?
The median first fall frost date for Islip, NY is around November 4. 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 October 19 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Islip, NY?
The frost-free growing season in Islip is about 207 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 Islip (207 frost-free days, a long season), 30 of 56 planner crops fit outright, 25 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Islip, NY?
Islip, NY is in USDA hardiness zone 7b (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 Islip, NY?
Start tomatoes indoors Mar 7 and plant out Apr 25 in Islip. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Islip?
Two: plant Mar 14 and again by Sep 13; both mature before Nov 11.
When do I plant garlic in Islip?
Nov 4 to Nov 25; it overwinters and is ready the following summer.
Can I get two tomato crops in Islip?
Yes: plant out Apr 25 for a summer crop, and set out a second round of transplants by Jul 5 for a fall crop.
Which nearby ZIP has a longer season?
West Islip (ZIP 11795) has 214 frost-free days, 7 more than Islip (ZIP 11751). See West Islip ZIP 11795 frost dates
Nearby and related
- Frost dates for East Islip, NY 11730 (1.6 mi)
- Frost dates for Bay Shore, NY 11706 (2.2 mi)
- Frost dates for Central Islip, NY 11722 (3.8 mi)
- Frost dates for West Islip, NY 11795 (4.6 mi)
- Frost dates for Bohemia, NY 11716 (5.4 mi)
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