Frost Dates for Brooklyn, MI 49230
Last spring frost May 5 · First fall frost October 4 · 152 frost-free days · USDA Zone 6a
ZIP 49230 has about 10,100 people.
Moderate season: 152 frost-free days. Spring frost risk spans April 21–May 19 (28 days). Fall frost risk spans September 20–October 20 (30 days).
Frost probability for 49230
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 19 | May 5 | April 21 |
| Fall (first frost) | September 20 | October 4 | October 20 |
Dates come from NOAA 1971–2000 freeze probabilities at JACKSON CO AP (26.7 km away); the 50% date is the median year.
Which crops fit a 152-day season in Brooklyn
In Brooklyn (152 frost-free days, a moderate season), 32 of 56 planner crops fit outright, 23 get two plantings, 1 crop is perennial.
| Crop | Start indoors | Plant out / sow | Days you have | Verdict | Last sow date |
|---|---|---|---|---|---|
| Tomato | Mar 31 | May 19–May 26 | 110 | fits: 80 days to maturity, 110 available after May 19. | Jun 4 |
| Pepper | Mar 24 | May 19–May 26 | 110 | fits: 75 days to maturity, 110 available after May 19. | Jun 9 |
| Lettuce | Mar 10 | Apr 7–Apr 14 | 187 | two-plantings: Plant Apr 7 and again by Aug 13; both mature before Oct 11. | Aug 13 |
| Carrots | — | Apr 14–Apr 21 | 194 | fits: 70 days to maturity, 194 available after Apr 14. | Aug 2 |
| Cucumber | Apr 14 | May 19–May 26 | 124 | fits: 60 days to maturity, 124 available after May 19. | Jul 8 |
| Beans | — | May 12–May 26 | 138 | two-plantings: Plant May 12 and again by Jul 15; both mature before Sep 27. | Jul 15 |
| Peas | — | Mar 10–May 19 | 215 | fits: 65 days to maturity, 215 available after Mar 10. | Jul 24 |
| Zucchini | Apr 21 | May 19–May 26 | 124 | two-plantings: Plant May 19 and again by Jul 13; both mature before Sep 20. | Jul 13 |
| Onion | Feb 10 | Apr 7–Apr 21 | 187 | fits: 100 days to maturity, 187 available after Apr 7. | — |
| Spinach | — | Mar 10–Apr 28 | 229 | two-plantings: Plant Mar 10 and again by Sep 1; both mature before Oct 25. | Sep 1 |
| Kale | Feb 24 | Apr 7–Apr 21 | 201 | two-plantings: Plant Apr 7 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Broccoli | Mar 10 | Apr 7–Apr 21 | 187 | fits: 80 days to maturity, 187 available after Apr 7. | Jul 9 |
| Cabbage | Mar 10 | Apr 7–Apr 21 | 201 | fits: 70 days to maturity, 201 available after Apr 7. | Aug 2 |
| Radish | — | Mar 10–Jun 2 | 215 | two-plantings: Plant Mar 10 and again by Sep 2; both mature before Oct 11. | Sep 2 |
| Beets | — | Mar 10–Jun 2 | 215 | two-plantings: Plant Mar 10 and again by Aug 3; both mature before Oct 11. | Aug 3 |
| Potatoes | — | Apr 21–Apr 28 | 173 | fits: 90 days to maturity, 173 available after Apr 21. | — |
| Garlic | — | Oct 4 | 257 | overwinter: Plant Oct 4 to Oct 25; harvest the following summer. | Oct 25 |
| Strawberry | — | Mar 31–May 26 | 208 | perennial: A perennial: plant Mar 31; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 7 | May 12–May 19 | 124 | fits: 75 days to maturity, 124 available after May 12. | Jun 16 |
| Pumpkin | Apr 21 | May 19–May 19 | 117 | fits: 100 days to maturity, 117 available after May 19. | May 22 |
| Cauliflower | Mar 24 | Apr 28–May 12 | 166 | fits: 75 days to maturity, 166 available after Apr 28. | Jul 14 |
| Swiss Chard | Mar 10 | Apr 21–Apr 21 | 173 | two-plantings: Plant Apr 21 and again by Aug 3; both mature before Oct 11. | Aug 3 |
| Arugula | — | Mar 10–Jun 2 | 229 | two-plantings: Plant Mar 10 and again by Sep 1; both mature before Oct 25. | Sep 1 |
| Brussel Sprouts | Mar 10 | Apr 7–Apr 21 | 201 | fits: 100 days to maturity, 201 available after Apr 7. | Jul 3 |
| Butternut Squash | Apr 21 | May 19–May 26 | 117 | fits: 100 days to maturity, 117 available after May 19. | May 22 |
| Eggplant | Mar 17 | May 19–May 26 | 110 | fits: 70 days to maturity, 110 available after May 19. | Jun 14 |
| Okra | Apr 7 | May 12–May 19 | 131 | two-plantings: Plant May 12 and again by Jul 13; both mature before Sep 20. | Jul 13 |
| Basil | Mar 31 | May 26–May 26 | 117 | fits: 60 days to maturity, 117 available after May 26. | Jul 8 |
| Cilantro | — | Apr 7–Apr 28 | 187 | two-plantings: Plant Apr 7 and again by Aug 8; both mature before Oct 11. | Aug 8 |
| Parsley | Feb 24 | May 12–May 19 | 152 | fits: 70 days to maturity, 152 available after May 12. | Jul 19 |
| Celery | Feb 24 | May 12–May 26 | 152 | fits: 120 days to maturity, 152 available after May 12. | May 30 |
| Scallions | Feb 24 | Apr 7–Apr 21 | 201 | two-plantings: Plant Apr 7 and again by Aug 12; both mature before Oct 25. | Aug 12 |
| Turnip | — | Apr 7–Apr 21 | 201 | two-plantings: Plant Apr 7 and again by Aug 22; both mature before Oct 25. | Aug 22 |
| Kohlrabi | — | Mar 24–Apr 7 | 215 | two-plantings: Plant Mar 24 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Bok Choy | Apr 7 | Apr 28–May 5 | 166 | two-plantings: Plant Apr 28 and again by Aug 13; both mature before Oct 11. | Aug 13 |
| Collards | Feb 24 | Apr 7–Apr 21 | 201 | two-plantings: Plant Apr 7 and again by Aug 12; both mature before Oct 25. | Aug 12 |
| Cantaloupe | Apr 21 | May 19–May 26 | 110 | fits: 85 days to maturity, 110 available after May 19. | May 30 |
| Chives | Feb 10 | May 12–May 19 | 166 | fits: 90 days to maturity, 166 available after May 12. | — |
| Dill | — | Mar 10–Jun 2 | 215 | two-plantings: Plant Mar 10 and again by Aug 3; both mature before Oct 11. | Aug 3 |
| Oregano | Feb 24 | May 12–May 19 | 166 | fits: 80 days to maturity, 166 available after May 12. | — |
| Rosemary | Feb 10 | May 12–May 19 | 152 | fits: 80 days to maturity, 152 available after May 12. | — |
| Sage | Mar 10 | May 12–May 19 | 166 | fits: 75 days to maturity, 166 available after May 12. | — |
| Thyme | Feb 24 | May 12–May 19 | 166 | fits: 90 days to maturity, 166 available after May 12. | — |
| Calendula | Mar 24 | Apr 21–May 5 | 173 | two-plantings: Plant Apr 21 and again by Aug 8; both mature before Oct 11. | Aug 8 |
| Cosmos | Apr 7 | May 5–May 19 | 138 | two-plantings: Plant May 5 and again by Jul 8; both mature before Sep 20. | Jul 8 |
| Lavender | Feb 10 | May 5–May 19 | 173 | fits: 90 days to maturity, 173 available after May 5. | — |
| Marigolds | Mar 24 | May 5–May 12 | 138 | two-plantings: Plant May 5 and again by Jul 18; both mature before Sep 20. | Jul 18 |
| Melons | Apr 21 | May 19–May 26 | 110 | fits: 85 days to maturity, 110 available after May 19. | May 30 |
| Mint | — | May 5–May 19 | 173 | fits: 90 days to maturity, 173 available after May 5. | — |
| Nasturtiums | Apr 7 | May 5–May 12 | 138 | two-plantings: Plant May 5 and again by Jul 13; both mature before Sep 20. | Jul 13 |
| Pole Beans | — | May 12–May 26 | 131 | fits: 65 days to maturity, 131 available after May 12. | Jul 3 |
| Spaghetti Squash | Apr 21 | May 19–May 26 | 117 | fits: 90 days to maturity, 117 available after May 19. | Jun 1 |
| Sunflowers | — | May 5–May 19 | 138 | fits: 70 days to maturity, 138 available after May 5. | Jun 28 |
| Tomatillos | Mar 10 | May 12–May 19 | 117 | fits: 75 days to maturity, 117 available after May 12. | Jun 9 |
| Watermelon | Apr 21 | May 12–May 19 | 117 | fits: 80 days to maturity, 117 available after May 12. | Jun 4 |
| Yellow Squash | Apr 21 | May 19–May 26 | 124 | two-plantings: Plant May 19 and again by Jul 13; both mature before Sep 20. | Jul 13 |
| Zinnias | Apr 7 | May 5–May 19 | 138 | two-plantings: Plant May 5 and again by Jul 8; both mature before Sep 20. | Jul 8 |
Month by month in Brooklyn
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 10), Lavender (Feb 10), Onion (Feb 10), Rosemary (Feb 10), Celery (Feb 24), Collards (Feb 24), +5 more. |
| March | Start indoors: Broccoli (Mar 10), Brussel Sprouts (Mar 10), Cabbage (Mar 10), Lettuce (Mar 10), Sage (Mar 10), Swiss Chard (Mar 10), +8 more. Direct sow from: Arugula (Mar 10), Beets (Mar 10), Dill (Mar 10), Peas (Mar 10), Radish (Mar 10), Spinach (Mar 10), +1 more. Plant: Strawberry (Mar 31). |
| April | Start indoors: Bok Choy (Apr 7), Corn (Apr 7), Cosmos (Apr 7), Nasturtiums (Apr 7), Okra (Apr 7), Zinnias (Apr 7), +9 more. Direct sow from: Cilantro (Apr 7), Turnip (Apr 7), Carrots (Apr 14), Potatoes (Apr 21). Transplant from: Broccoli (Apr 7), Brussel Sprouts (Apr 7), Cabbage (Apr 7), Collards (Apr 7), Kale (Apr 7), Lettuce (Apr 7), +6 more. |
| May | Direct sow from: Sunflowers (May 5), Beans (May 12), Pole Beans (May 12). Transplant from: Cosmos (May 5), Lavender (May 5), Marigolds (May 5), Mint (May 5), Nasturtiums (May 5), Zinnias (May 5), +23 more. Last frost around May 5. Last sowing dates: Butternut Squash (May 22), Pumpkin (May 22), Cantaloupe (May 30), Celery (May 30), Melons (May 30). |
| June | Last sowing dates: Spaghetti Squash (Jun 1), Tomato (Jun 4), Watermelon (Jun 4), Pepper (Jun 9), Tomatillos (Jun 9), Eggplant (Jun 14), +2 more. |
| July | Last sowing dates: Brussel Sprouts (Jul 3), Pole Beans (Jul 3), Basil (Jul 8), Cosmos (Jul 8), Cucumber (Jul 8), Zinnias (Jul 8), +10 more. |
| August | Last sowing dates: Cabbage (Aug 2), Carrots (Aug 2), Beets (Aug 3), Dill (Aug 3), Swiss Chard (Aug 3), Calendula (Aug 8), +8 more. |
| September | Last sowing dates: Arugula (Sep 1), Spinach (Sep 1), Radish (Sep 2). |
| October | Direct sow from: Garlic (Oct 4). First frost around October 4. Last sowing dates: Garlic (Oct 25). |
| November | Harvest remaining cold-hardy crops: kale, carrots, and beets. Plant garlic bulbs for next year. |
| 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 Brooklyn, MI (ZIP 49230)?
The median last spring frost date for Brooklyn, MI (ZIP code 49230) is around May 5. 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 21; one in ten it runs past May 19.
What is the first fall frost date in Brooklyn, MI?
The median first fall frost date for Brooklyn, MI is around October 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 September 20 in the earliest one-in-ten years, so cover tomatoes and peppers from then.
How long is the growing season in Brooklyn, MI?
The frost-free growing season in Brooklyn is about 152 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 Brooklyn (152 frost-free days, a moderate season), 32 of 56 planner crops fit outright, 23 get two plantings, 1 crop is perennial.
What USDA hardiness zone is Brooklyn, MI?
Brooklyn, MI is in USDA hardiness zone 6a (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 Brooklyn, MI?
Start tomatoes indoors Mar 31 and plant out May 19 in Brooklyn. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Brooklyn?
Two: plant Apr 7 and again by Aug 13; both mature before Oct 11.
When do I plant garlic in Brooklyn?
Oct 4 to Oct 25; it overwinters and is ready the following summer.
Which nearby ZIP has a longer season?
Adrian (ZIP 49221) has 160 frost-free days, 8 more than Brooklyn (ZIP 49230). See Adrian ZIP 49221 frost dates
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