Holt, MI planting zone & frost dates
Holt is in USDA hardiness zone 6a. The last spring frost usually comes around April 28 and the first fall frost around October 17, for a growing season of about 173 days.
Planting calendar for Holt
Dates are counted from the average last spring frost (April 28) using the typical timing recommended by U.S. extension services. Warm-season crops go out only after the danger of frost has passed and the soil has warmed.
| Crop | When |
|---|---|
| Tomatoes | Start seeds indoors: Mar 3 – Mar 17 Transplant outdoors: May 5 – May 12 |
| Peppers | Start seeds indoors: Feb 17 – Mar 3 Transplant outdoors: May 12 – May 19 |
| Eggplant | Start seeds indoors: Feb 17 – Mar 3 Transplant outdoors: May 12 – May 19 |
| Broccoli | Start seeds indoors: Feb 17 – Mar 3 Transplant outdoors: Mar 31 – Apr 14 |
| Cabbage | Start seeds indoors: Feb 17 – Mar 3 Transplant outdoors: Mar 31 – Apr 14 |
| Onions (sets) | Plant outdoors: Mar 31 – Apr 14 |
| Peas | Sow outdoors: Mar 17 – Mar 31 |
| Spinach | Sow outdoors: Mar 17 – Mar 31 |
| Lettuce | Sow outdoors: Mar 31 – Apr 14 |
| Carrots | Sow outdoors: Mar 31 – Apr 14 |
| Potatoes | Plant outdoors: Mar 31 – Apr 14 |
| Beans | Sow outdoors: May 5 – May 12 |
| Sweet corn | Sow outdoors: May 5 – May 12 |
| Cucumbers | Sow outdoors: May 5 – May 12 |
| Squash & zucchini | Sow outdoors: May 5 – May 12 |
| Basil | Start seeds indoors: Mar 17 – Mar 31 Transplant outdoors: May 5 – May 12 |
Fall garden: cool-season crops like lettuce, spinach and kale can be sown again around Aug 22 (8 weeks before the average first fall frost on Oct 17).
Frost risk in detail
| 90% chance | 50% chance | 10% chance | |
|---|---|---|---|
| Last 32°F frost in spring is after | Apr 13 | Apr 28 | May 16 |
| First 32°F frost in fall is before | Nov 1 | Oct 17 | Oct 1 |
How to read it: in spring there is a 10% chance of a frost after May 16, so that is a safe date for tender plants. In fall there is a 10% chance of frost before October 1. A hard freeze (28°F) usually ends around April 15.
Hardiness zone by ZIP code in Holt
- 48842 zone 6a
Nearby cities
Questions
What growing zone is Holt, MI?
Holt is in USDA Plant Hardiness Zone 6a (average extreme winter low -10°F to -5°F), according to the USDA 2023 map.
When is the last frost in Holt?
The average last spring frost (32°F) in Holt is April 28. There is still a 10% chance of frost until May 16.
When can I plant tomatoes in Holt?
Transplant tomatoes outdoors 1–2 weeks after the average last frost: around May 5 – May 12. Start seeds indoors 6–8 weeks before the last frost.
Frost dates: NOAA U.S. Climate Normals 1991–2020, station East Lansing 4 S, MI (USC00202395), 4.5 km (2.8 mi) from the city center, elevation 268 m, based on 16 years of records. Hardiness zone: USDA Plant Hardiness Zone Map 2023 for the ZIP code nearest to the city center. Microclimates (valleys, hills, cities, coasts) can be warmer or colder: check the local forecast before planting. How we calculate the data.