When to plant in Holt, MI
USDA Zone 6aEverything below — frost dates, hardiness zone, and what to plant when in Holt, Michigan — is derived from the closest NOAA station with complete climate normals.
In zone 6a, Holt gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
EAST LANSING 4 S · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Holt’s own odds, recorded at EAST LANSING 4 S.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 27 | May 8 | Apr 23 | Sep 22 | Oct 4 | Oct 18 |
| 32°F | May 16 | Apr 28 | Apr 13 | Oct 1 | Oct 17 | Nov 1 |
| 28°F | May 1 | Apr 15 | Apr 2 | Oct 14 | Oct 30 | Nov 13 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Holt, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 17 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Holt planting FAQ
When is the last spring frost in Holt, MI?
Holt's average last spring frost falls near April 28 — the 50% mark at 32°F in the 1991–2020 normals. Hold tender transplants until the risk has passed, then plant out.
When is the first fall frost in Holt, MI?
In Holt, the first 32°F freeze of fall lands around October 17 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Holt in?
Holt is in USDA hardiness zone 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Holt?
Holt has about 172 frost-free days — a moderate growing season — between the average last spring frost (April 28) and first fall frost (October 17).
When should I plant tomatoes in Holt?
For Holt, sow tomatoes indoors about March 3–March 17 and move the seedlings out around May 5, after the last spring frost.
Never miss a window in Holt
An email when it’s time to start seeds, transplant, and sow — timed to Holt’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reachFrost dates recorded at EAST LANSING 4 S, 5 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Holt, MI — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00202395. Retrieved from https://blissgarden.com/michigan/holt.