Frost Dates for Mount Horeb, WI 53572
Last spring frost May 2 · First fall frost October 4 · 155 frost-free days · USDA Zone 5a
ZIP 53572 has about 10,400 people.
Moderate season: 155 frost-free days. Spring frost risk spans April 17–May 20 (33 days). Fall frost risk spans September 20–October 17 (27 days).
Frost probability for 53572
| Frost | 10% | 50% | 90% |
|---|---|---|---|
| Spring (last frost) | May 20 | May 2 | April 17 |
| Fall (first frost) | September 20 | October 4 | October 17 |
Dates come from NOAA 1971–2000 freeze probabilities at CHARMANY FARM (23.5 km away); the 50% date is the median year.
Which crops fit a 155-day season in Mount Horeb
In Mount Horeb (155 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 28 | May 16–May 23 | 113 | fits: 80 days to maturity, 113 available after May 16. | Jun 4 |
| Pepper | Mar 21 | May 16–May 23 | 113 | fits: 75 days to maturity, 113 available after May 16. | Jun 9 |
| Lettuce | Mar 7 | Apr 4–Apr 11 | 190 | two-plantings: Plant Apr 4 and again by Aug 13; both mature before Oct 11. | Aug 13 |
| Carrots | — | Apr 11–Apr 18 | 197 | fits: 70 days to maturity, 197 available after Apr 11. | Aug 2 |
| Cucumber | Apr 11 | May 16–May 23 | 127 | fits: 60 days to maturity, 127 available after May 16. | Jul 8 |
| Beans | — | May 9–May 23 | 141 | two-plantings: Plant May 9 and again by Jul 15; both mature before Sep 27. | Jul 15 |
| Peas | — | Mar 7–May 16 | 218 | fits: 65 days to maturity, 218 available after Mar 7. | Jul 24 |
| Zucchini | Apr 18 | May 16–May 23 | 127 | two-plantings: Plant May 16 and again by Jul 13; both mature before Sep 20. | Jul 13 |
| Onion | Feb 7 | Apr 4–Apr 18 | 190 | fits: 100 days to maturity, 190 available after Apr 4. | — |
| Spinach | — | Mar 7–Apr 25 | 232 | two-plantings: Plant Mar 7 and again by Sep 1; both mature before Oct 25. | Sep 1 |
| Kale | Feb 21 | Apr 4–Apr 18 | 204 | two-plantings: Plant Apr 4 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Broccoli | Mar 7 | Apr 4–Apr 18 | 190 | fits: 80 days to maturity, 190 available after Apr 4. | Jul 9 |
| Cabbage | Mar 7 | Apr 4–Apr 18 | 204 | fits: 70 days to maturity, 204 available after Apr 4. | Aug 2 |
| Radish | — | Mar 7–May 30 | 218 | two-plantings: Plant Mar 7 and again by Sep 2; both mature before Oct 11. | Sep 2 |
| Beets | — | Mar 7–May 30 | 218 | two-plantings: Plant Mar 7 and again by Aug 3; both mature before Oct 11. | Aug 3 |
| Potatoes | — | Apr 18–Apr 25 | 176 | fits: 90 days to maturity, 176 available after Apr 18. | — |
| Garlic | — | Oct 4 | 260 | overwinter: Plant Oct 4 to Oct 25; harvest the following summer. | Oct 25 |
| Strawberry | — | Mar 28–May 23 | 211 | perennial: A perennial: plant Mar 28; it fruits from the following year and keeps producing for several years. | — |
| Corn | Apr 4 | May 9–May 16 | 127 | fits: 75 days to maturity, 127 available after May 9. | Jun 16 |
| Pumpkin | Apr 18 | May 16–May 16 | 120 | fits: 100 days to maturity, 120 available after May 16. | May 22 |
| Cauliflower | Mar 21 | Apr 25–May 9 | 169 | fits: 75 days to maturity, 169 available after Apr 25. | Jul 14 |
| Swiss Chard | Mar 7 | Apr 18–Apr 18 | 176 | two-plantings: Plant Apr 18 and again by Aug 3; both mature before Oct 11. | Aug 3 |
| Arugula | — | Mar 7–May 30 | 232 | two-plantings: Plant Mar 7 and again by Sep 1; both mature before Oct 25. | Sep 1 |
| Brussel Sprouts | Mar 7 | Apr 4–Apr 18 | 204 | fits: 100 days to maturity, 204 available after Apr 4. | Jul 3 |
| Butternut Squash | Apr 18 | May 16–May 23 | 120 | fits: 100 days to maturity, 120 available after May 16. | May 22 |
| Eggplant | Mar 14 | May 16–May 23 | 113 | fits: 70 days to maturity, 113 available after May 16. | Jun 14 |
| Okra | Apr 4 | May 9–May 16 | 134 | two-plantings: Plant May 9 and again by Jul 13; both mature before Sep 20. | Jul 13 |
| Basil | Mar 28 | May 23–May 23 | 120 | fits: 60 days to maturity, 120 available after May 23. | Jul 8 |
| Cilantro | — | Apr 4–Apr 25 | 190 | two-plantings: Plant Apr 4 and again by Aug 8; both mature before Oct 11. | Aug 8 |
| Parsley | Feb 21 | May 9–May 16 | 155 | fits: 70 days to maturity, 155 available after May 9. | Jul 19 |
| Celery | Feb 21 | May 9–May 23 | 155 | fits: 120 days to maturity, 155 available after May 9. | May 30 |
| Scallions | Feb 21 | Apr 4–Apr 18 | 204 | two-plantings: Plant Apr 4 and again by Aug 12; both mature before Oct 25. | Aug 12 |
| Turnip | — | Apr 4–Apr 18 | 204 | two-plantings: Plant Apr 4 and again by Aug 22; both mature before Oct 25. | Aug 22 |
| Kohlrabi | — | Mar 21–Apr 4 | 218 | two-plantings: Plant Mar 21 and again by Aug 17; both mature before Oct 25. | Aug 17 |
| Bok Choy | Apr 4 | Apr 25–May 2 | 169 | two-plantings: Plant Apr 25 and again by Aug 13; both mature before Oct 11. | Aug 13 |
| Collards | Feb 21 | Apr 4–Apr 18 | 204 | two-plantings: Plant Apr 4 and again by Aug 12; both mature before Oct 25. | Aug 12 |
| Cantaloupe | Apr 18 | May 16–May 23 | 113 | fits: 85 days to maturity, 113 available after May 16. | May 30 |
| Chives | Feb 7 | May 9–May 16 | 169 | fits: 90 days to maturity, 169 available after May 9. | — |
| Dill | — | Mar 7–May 30 | 218 | two-plantings: Plant Mar 7 and again by Aug 3; both mature before Oct 11. | Aug 3 |
| Oregano | Feb 21 | May 9–May 16 | 169 | fits: 80 days to maturity, 169 available after May 9. | — |
| Rosemary | Feb 7 | May 9–May 16 | 155 | fits: 80 days to maturity, 155 available after May 9. | — |
| Sage | Mar 7 | May 9–May 16 | 169 | fits: 75 days to maturity, 169 available after May 9. | — |
| Thyme | Feb 21 | May 9–May 16 | 169 | fits: 90 days to maturity, 169 available after May 9. | — |
| Calendula | Mar 21 | Apr 18–May 2 | 176 | two-plantings: Plant Apr 18 and again by Aug 8; both mature before Oct 11. | Aug 8 |
| Cosmos | Apr 4 | May 2–May 16 | 141 | two-plantings: Plant May 2 and again by Jul 8; both mature before Sep 20. | Jul 8 |
| Lavender | Feb 7 | May 2–May 16 | 176 | fits: 90 days to maturity, 176 available after May 2. | — |
| Marigolds | Mar 21 | May 2–May 9 | 141 | two-plantings: Plant May 2 and again by Jul 18; both mature before Sep 20. | Jul 18 |
| Melons | Apr 18 | May 16–May 23 | 113 | fits: 85 days to maturity, 113 available after May 16. | May 30 |
| Mint | — | May 2–May 16 | 176 | fits: 90 days to maturity, 176 available after May 2. | — |
| Nasturtiums | Apr 4 | May 2–May 9 | 141 | two-plantings: Plant May 2 and again by Jul 13; both mature before Sep 20. | Jul 13 |
| Pole Beans | — | May 9–May 23 | 134 | fits: 65 days to maturity, 134 available after May 9. | Jul 3 |
| Spaghetti Squash | Apr 18 | May 16–May 23 | 120 | fits: 90 days to maturity, 120 available after May 16. | Jun 1 |
| Sunflowers | — | May 2–May 16 | 141 | fits: 70 days to maturity, 141 available after May 2. | Jun 28 |
| Tomatillos | Mar 7 | May 9–May 16 | 120 | fits: 75 days to maturity, 120 available after May 9. | Jun 9 |
| Watermelon | Apr 18 | May 9–May 16 | 120 | fits: 80 days to maturity, 120 available after May 9. | Jun 4 |
| Yellow Squash | Apr 18 | May 16–May 23 | 127 | two-plantings: Plant May 16 and again by Jul 13; both mature before Sep 20. | Jul 13 |
| Zinnias | Apr 4 | May 2–May 16 | 141 | two-plantings: Plant May 2 and again by Jul 8; both mature before Sep 20. | Jul 8 |
Month by month in Mount Horeb
| Month | What to do |
|---|---|
| January | Plan your garden layout and order seeds. Research varieties suited to your frost dates. |
| February | Start indoors: Chives (Feb 7), Lavender (Feb 7), Onion (Feb 7), Rosemary (Feb 7), Celery (Feb 21), Collards (Feb 21), +5 more. |
| March | Start indoors: Broccoli (Mar 7), Brussel Sprouts (Mar 7), Cabbage (Mar 7), Lettuce (Mar 7), Sage (Mar 7), Swiss Chard (Mar 7), +8 more. Direct sow from: Arugula (Mar 7), Beets (Mar 7), Dill (Mar 7), Peas (Mar 7), Radish (Mar 7), Spinach (Mar 7), +1 more. Plant: Strawberry (Mar 28). |
| April | Start indoors: Bok Choy (Apr 4), Corn (Apr 4), Cosmos (Apr 4), Nasturtiums (Apr 4), Okra (Apr 4), Zinnias (Apr 4), +9 more. Direct sow from: Cilantro (Apr 4), Turnip (Apr 4), Carrots (Apr 11), Potatoes (Apr 18). Transplant from: Broccoli (Apr 4), Brussel Sprouts (Apr 4), Cabbage (Apr 4), Collards (Apr 4), Kale (Apr 4), Lettuce (Apr 4), +6 more. |
| May | Direct sow from: Sunflowers (May 2), Beans (May 9), Pole Beans (May 9). Transplant from: Cosmos (May 2), Lavender (May 2), Marigolds (May 2), Mint (May 2), Nasturtiums (May 2), Zinnias (May 2), +23 more. Last frost around May 2. 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 Mount Horeb, WI (ZIP 53572)?
The median last spring frost date for Mount Horeb, WI (ZIP code 53572) is around May 2. 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 17; one in ten it runs past May 20.
What is the first fall frost date in Mount Horeb, WI?
The median first fall frost date for Mount Horeb, WI 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 Mount Horeb, WI?
The frost-free growing season in Mount Horeb is about 155 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 Mount Horeb (155 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 Mount Horeb, WI?
Mount Horeb, WI is in USDA hardiness zone 5a (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 Mount Horeb, WI?
Start tomatoes indoors Mar 28 and plant out May 16 in Mount Horeb. The planner uses the local median last frost and this crop's indoor-start and transplant offsets.
How many plantings of lettuce fit in Mount Horeb?
Two: plant Apr 4 and again by Aug 13; both mature before Oct 11.
When do I plant garlic in Mount Horeb?
Oct 4 to Oct 25; it overwinters and is ready the following summer.
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