When to plant in Holbrook, MA
USDA Zone 6bHolbrook, Massachusetts frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 6b, Holbrook gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average last spring frost in Holbrook is now 11 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
BROCKTON · 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 Holbrook’s own odds, recorded at BROCKTON.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 18 | May 5 | Apr 24 | Sep 26 | Oct 7 | Oct 22 |
| 32°F | May 5 | Apr 22 | Apr 8 | Oct 5 | Oct 19 | Nov 3 |
| 28°F | Apr 20 | Apr 6 | Mar 27 | Oct 16 | Oct 31 | Nov 15 |
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 Holbrook, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 12 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.
Holbrook planting FAQ
When is the last spring frost in Holbrook, MA?
Holbrook's average last spring frost falls near April 22 — 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 Holbrook, MA?
In Holbrook, the first 32°F freeze of fall lands around October 19 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Holbrook in?
Holbrook is in USDA hardiness zone 6b. In zone 6b, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Holbrook?
Holbrook has about 180 frost-free days — a moderate growing season — between the average last spring frost (April 22) and first fall frost (October 19).
When should I plant tomatoes in Holbrook?
For Holbrook, sow tomatoes indoors about February 25–March 11 and move the seedlings out around April 29, after the last spring frost.
Never miss a window in Holbrook
An email when it’s time to start seeds, transplant, and sow — timed to Holbrook’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Abington · 4 km
- Randolph Town · 6 km
- Brockton · 7 km
- Braintree Town · 7 km
- Weymouth Town · 9 km
- Milton · 13 km
- Quincy · 13 km
- Norwood · 17 km
Frost dates recorded at BROCKTON, 10 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 Holbrook, MA — Frost Dates & Zone 6b." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00190860. Retrieved from https://blissgarden.com/massachusetts/holbrook.