Frost Dates for Tiffin, OH 44883
Last spring frost April 26 · First fall frost October 15 · 172 frost-free days · USDA Zone 6a
ZIP 44883 has about 28,100 people.
Moderate season: 172 frost-free days. Spring frost risk spans April 15–May 9 (24 days). Fall frost risk spans September 30–October 29 (29 days).
Frost probability for 44883
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 9 | April 26 | April 15 |
| Fall (first frost) | September 30 | October 15 | October 29 |
Dates come from NOAA 1971–2000 freeze probabilities at TIFFIN (1.0 km away); the 50% date is the median year.
Which crops fit a 172-day season in Tiffin
In Tiffin (172 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 22 | May 10–May 17 | 130 | fits: 80 days to maturity, 130 available after May 10. | Jun 15 |
| Pepper | Mar 15 | May 10–May 17 | 130 | fits: 75 days to maturity, 130 available after May 10. | Jun 20 |
| Lettuce | Mar 1 | Mar 29–Apr 5 | 207 | two-plantings: Plant Mar 29 and again by Aug 24; both mature before Oct 22. | Aug 24 |
| Carrots | — | Apr 5–Apr 12 | 214 | fits: 70 days to maturity, 214 available after Apr 5. | Aug 13 |
| Cucumber | Apr 5 | May 10–May 17 | 144 | two-plantings: Plant May 10 and again by Jul 19; both mature before Oct 1. | Jul 19 |
| Beans | — | May 3–May 17 | 158 | two-plantings: Plant May 3 and again by Jul 26; both mature before Oct 8. | Jul 26 |
| Peas | — | Mar 1–May 10 | 235 | fits: 65 days to maturity, 235 available after Mar 1. | Aug 4 |
| Zucchini | Apr 12 | May 10–May 17 | 144 | two-plantings: Plant May 10 and again by Jul 24; both mature before Oct 1. | Jul 24 |
| Onion | Feb 1 | Mar 29–Apr 12 | 207 | fits: 100 days to maturity, 207 available after Mar 29. | — |
| Spinach | — | Mar 1–Apr 19 | 249 | two-plantings: Plant Mar 1 and again by Sep 12; both mature before Nov 5. | Sep 12 |
| Kale | Feb 15 | Mar 29–Apr 12 | 221 | two-plantings: Plant Mar 29 and again by Aug 28; both mature before Nov 5. | Aug 28 |
| Broccoli | Mar 1 | Mar 29–Apr 12 | 207 | fits: 80 days to maturity, 207 available after Mar 29. | Jul 20 |
| Cabbage | Mar 1 | Mar 29–Apr 12 | 221 | fits: 70 days to maturity, 221 available after Mar 29. | Aug 13 |
| Radish | — | Mar 1–May 24 | 235 | two-plantings: Plant Mar 1 and again by Sep 13; both mature before Oct 22. | Sep 13 |
| Beets | — | Mar 1–May 24 | 235 | two-plantings: Plant Mar 1 and again by Aug 14; both mature before Oct 22. | Aug 14 |
| Potatoes | — | Apr 12–Apr 19 | 193 | fits: 90 days to maturity, 193 available after Apr 12. | — |
| Garlic | — | Oct 15 | 277 | overwinter: Plant Oct 15 to Nov 5; harvest the following summer. | Nov 5 |
| Strawberry | — | Mar 22–May 17 | 228 | perennial: A perennial: plant Mar 22; it fruits from the following year and keeps producing for several years. | — |
| Corn | Mar 29 | May 3–May 10 | 144 | fits: 75 days to maturity, 144 available after May 3. | Jun 27 |
| Pumpkin | Apr 12 | May 10–May 10 | 137 | fits: 100 days to maturity, 137 available after May 10. | Jun 2 |
| Cauliflower | Mar 15 | Apr 19–May 3 | 186 | fits: 75 days to maturity, 186 available after Apr 19. | Jul 25 |
| Swiss Chard | Mar 1 | Apr 12–Apr 12 | 193 | two-plantings: Plant Apr 12 and again by Aug 14; both mature before Oct 22. | Aug 14 |
| Arugula | — | Mar 1–May 24 | 249 | two-plantings: Plant Mar 1 and again by Sep 12; both mature before Nov 5. | Sep 12 |
| Brussel Sprouts | Mar 1 | Mar 29–Apr 12 | 221 | fits: 100 days to maturity, 221 available after Mar 29. | Jul 14 |
| Butternut Squash | Apr 12 | May 10–May 17 | 137 | fits: 100 days to maturity, 137 available after May 10. | Jun 2 |
| Eggplant | Mar 8 | May 10–May 17 | 130 | fits: 70 days to maturity, 130 available after May 10. | Jun 25 |
| Okra | Mar 29 | May 3–May 10 | 151 | two-plantings: Plant May 3 and again by Jul 24; both mature before Oct 1. | Jul 24 |
| Basil | Mar 22 | May 17–May 17 | 137 | two-plantings: Plant May 17 and again by Jul 19; both mature before Oct 1. | Jul 19 |
| Cilantro | — | Mar 29–Apr 19 | 207 | two-plantings: Plant Mar 29 and again by Aug 19; both mature before Oct 22. | Aug 19 |
| Parsley | Feb 15 | May 3–May 10 | 172 | fits: 70 days to maturity, 172 available after May 3. | Jul 30 |
| Celery | Feb 15 | May 3–May 17 | 172 | fits: 120 days to maturity, 172 available after May 3. | Jun 10 |
| Scallions | Feb 15 | Mar 29–Apr 12 | 221 | two-plantings: Plant Mar 29 and again by Aug 23; both mature before Nov 5. | Aug 23 |
| Turnip | — | Mar 29–Apr 12 | 221 | two-plantings: Plant Mar 29 and again by Sep 2; both mature before Nov 5. | Sep 2 |
| Kohlrabi | — | Mar 15–Mar 29 | 235 | two-plantings: Plant Mar 15 and again by Aug 28; both mature before Nov 5. | Aug 28 |
| Bok Choy | Mar 29 | Apr 19–Apr 26 | 186 | two-plantings: Plant Apr 19 and again by Aug 24; both mature before Oct 22. | Aug 24 |
| Collards | Feb 15 | Mar 29–Apr 12 | 221 | two-plantings: Plant Mar 29 and again by Aug 23; both mature before Nov 5. | Aug 23 |
| Cantaloupe | Apr 12 | May 10–May 17 | 130 | fits: 85 days to maturity, 130 available after May 10. | Jun 10 |
| Chives | Feb 1 | May 3–May 10 | 186 | fits: 90 days to maturity, 186 available after May 3. | — |
| Dill | — | Mar 1–May 24 | 235 | two-plantings: Plant Mar 1 and again by Aug 14; both mature before Oct 22. | Aug 14 |
| Oregano | Feb 15 | May 3–May 10 | 186 | fits: 80 days to maturity, 186 available after May 3. | — |
| Rosemary | Feb 1 | May 3–May 10 | 172 | fits: 80 days to maturity, 172 available after May 3. | — |
| Sage | Mar 1 | May 3–May 10 | 186 | fits: 75 days to maturity, 186 available after May 3. | — |
| Thyme | Feb 15 | May 3–May 10 | 186 | fits: 90 days to maturity, 186 available after May 3. | — |
| Calendula | Mar 15 | Apr 12–Apr 26 | 193 | two-plantings: Plant Apr 12 and again by Aug 19; both mature before Oct 22. | Aug 19 |
| Cosmos | Mar 29 | Apr 26–May 10 | 158 | two-plantings: Plant Apr 26 and again by Jul 19; both mature before Oct 1. | Jul 19 |
| Lavender | Feb 1 | Apr 26–May 10 | 193 | fits: 90 days to maturity, 193 available after Apr 26. | — |
| Marigolds | Mar 15 | Apr 26–May 3 | 158 | two-plantings: Plant Apr 26 and again by Jul 29; both mature before Oct 1. | Jul 29 |
| Melons | Apr 12 | May 10–May 17 | 130 | fits: 85 days to maturity, 130 available after May 10. | Jun 10 |
| Mint | — | Apr 26–May 10 | 193 | fits: 90 days to maturity, 193 available after Apr 26. | — |
| Nasturtiums | Mar 29 | Apr 26–May 3 | 158 | two-plantings: Plant Apr 26 and again by Jul 24; both mature before Oct 1. | Jul 24 |
| Pole Beans | — | May 3–May 17 | 151 | fits: 65 days to maturity, 151 available after May 3. | Jul 14 |
| Spaghetti Squash | Apr 12 | May 10–May 17 | 137 | fits: 90 days to maturity, 137 available after May 10. | Jun 12 |
| Sunflowers | — | Apr 26–May 10 | 158 | fits: 70 days to maturity, 158 available after Apr 26. | Jul 9 |
| Tomatillos | Mar 1 | May 3–May 10 | 137 | fits: 75 days to maturity, 137 available after May 3. | Jun 20 |
| Watermelon | Apr 12 | May 3–May 10 | 137 | fits: 80 days to maturity, 137 available after May 3. | Jun 15 |
| Yellow Squash | Apr 12 | May 10–May 17 | 144 | two-plantings: Plant May 10 and again by Jul 24; both mature before Oct 1. | Jul 24 |
| Zinnias | Mar 29 | Apr 26–May 10 | 158 | two-plantings: Plant Apr 26 and again by Jul 19; both mature before Oct 1. | Jul 19 |
Month by month in Tiffin
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 1), Lavender (Feb 1), Onion (Feb 1), Rosemary (Feb 1), Celery (Feb 15), Collards (Feb 15), +5 more. |
| March | Start indoors: Broccoli (Mar 1), Brussel Sprouts (Mar 1), Cabbage (Mar 1), Lettuce (Mar 1), Sage (Mar 1), Swiss Chard (Mar 1), +14 more. Direct sow from: Arugula (Mar 1), Beets (Mar 1), Dill (Mar 1), Peas (Mar 1), Radish (Mar 1), Spinach (Mar 1), +3 more. Transplant from: Broccoli (Mar 29), Brussel Sprouts (Mar 29), Cabbage (Mar 29), Collards (Mar 29), Kale (Mar 29), Lettuce (Mar 29), +2 more. Plant: Strawberry (Mar 22). |
| April | Start indoors: Cucumber (Apr 5), Butternut Squash (Apr 12), Cantaloupe (Apr 12), Melons (Apr 12), Pumpkin (Apr 12), Spaghetti Squash (Apr 12), +3 more. Direct sow from: Carrots (Apr 5), Potatoes (Apr 12), Sunflowers (Apr 26). Transplant from: Calendula (Apr 12), Swiss Chard (Apr 12), Bok Choy (Apr 19), Cauliflower (Apr 19), Cosmos (Apr 26), Lavender (Apr 26), +4 more. Last frost around April 26. |
| May | Direct sow from: Beans (May 3), Pole Beans (May 3). Transplant from: Celery (May 3), Chives (May 3), Corn (May 3), Okra (May 3), Oregano (May 3), Parsley (May 3), +17 more. |
| June | Last sowing dates: Butternut Squash (Jun 2), Pumpkin (Jun 2), Cantaloupe (Jun 10), Celery (Jun 10), Melons (Jun 10), Spaghetti Squash (Jun 12), +6 more. |
| July | Last sowing dates: Sunflowers (Jul 9), Brussel Sprouts (Jul 14), Pole Beans (Jul 14), Basil (Jul 19), Cosmos (Jul 19), Cucumber (Jul 19), +10 more. |
| August | Last sowing dates: Peas (Aug 4), Cabbage (Aug 13), Carrots (Aug 13), Beets (Aug 14), Dill (Aug 14), Swiss Chard (Aug 14), +8 more. |
| September | Last sowing dates: Turnip (Sep 2), Arugula (Sep 12), Spinach (Sep 12), Radish (Sep 13). |
| October | Direct sow from: Garlic (Oct 15). First frost around October 15. |
| November | Last sowing dates: Garlic (Nov 5). |
| 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 Tiffin, OH (ZIP 44883)?
The median last spring frost date for Tiffin, OH (ZIP code 44883) is around April 26. 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 15; one in ten it runs past May 9.
What is the first fall frost date in Tiffin, OH?
The median first fall frost date for Tiffin, OH is around October 15. 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 Tiffin, OH?
The frost-free growing season in Tiffin is about 172 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 Tiffin (172 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 Tiffin, OH?
Tiffin, OH 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 Tiffin, OH?
Start tomatoes indoors Mar 22 and plant out May 10 in Tiffin. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Tiffin?
Two: plant Mar 29 and again by Aug 24; both mature before Oct 22.
When do I plant garlic in Tiffin?
Oct 15 to Nov 5; it overwinters and is ready the following summer.
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