Massachusetts · 16 cities · spring 2026
When to apply crabgrass preventer in Massachusetts
Last spring's pre-emergent window, largest Massachusetts cities
Each bar runs from the day the soil held 50°F to the day it held 55°F (2026).
- 50°F to 55°F
Every Massachusetts city
Spring 2026 dates and today's verdict.
| City | Held 50°F (2026) | Held 55°F (2026) | Soil today | Today |
|---|---|---|---|---|
| Boston, MA | Apr 27 | May 6 | 52°F | Season over |
| Worcester, MA | May 14 | May 18 | 48°F | Season over |
| Springfield, MA | May 6 | May 18 | 48°F | Season over |
| Lowell, MA | May 14 | May 18 | 49°F | Season over |
| New Bedford, MA | May 2 | May 18 | 50°F | Season over |
| Brockton, MA | May 5 | May 18 | 49°F | Season over |
| Framingham, MA | May 6 | May 18 | 48°F | Season over |
| Haverhill, MA | May 6 | May 18 | 50°F | Season over |
| Barnstable, MA | May 1 | May 17 | 52°F | Season over |
| Pittsfield, MA | May 18 | Jun 6 | 45°F | Season over |
| Leominster, MA | May 17 | Jun 5 | 48°F | Season over |
| Beverly, MA | May 4 | May 17 | 52°F | Season over |
| Amherst, MA | May 14 | May 19 | 48°F | Season over |
| Greenfield, MA | May 17 | Jun 5 | 47°F | Season over |
| Southbridge, MA | May 14 | Jun 5 | 48°F | Season over |
| Duxbury, MA | May 4 | May 17 | 50°F | Season over |
Crabgrass seeds start to germinate once the top 2 to 4 inches of soil stay near 55°F for several days. A pre-emergent works as a barrier in the soil, so it has to be down and watered in before that: the usual advice is to apply it while the soil holds 50 to 55°F. The dates here are when the modelled soil began to hold each temperature last spring; this year's window will move with the weather, which is why each city page shows today's reading and the 7-day forecast.
Questions
- When should I put down crabgrass preventer in Massachusetts?
- When the soil holds 50 to 55°F. Last spring that was around May 6 to May 18 across 16 Massachusetts cities, earlier in the south and in cities.
- Is it too late to apply pre-emergent?
- Once the soil has held 55°F for a week or more, crabgrass is germinating and a pre-emergent will not stop the seedlings already up. Each city page says which side of that line it is on today.
Soil temperature today in Massachusetts →
Data: Global Forecast System (GFS) 0.25°, soil temperature 0–10 cm (TSOIL) (NOAA National Centers for Environmental Prediction (NCEP)); GeoNames gazetteer (cities15000) (GeoNames).