Snap bean
What Plant Yet? knows about snap bean, and where each number comes from. For today's answer, pick your town.
Planting numbers
- Frost category
- Tender Source: Colorado State University Extension
- Plant outdoors
- On the typical last frost date Given for tender crops as a group. Source: Colorado State University Extension
- Cover at or below
- 32°F Given for tender crops as a group. Source: Utah State University Extension
- Grows once daytime temperatures reach
- 55°F Given for tender crops as a group. Source: Colorado State University Extension
- Days to harvest
- 60 Source: Colorado State University Extension
Left out because we found no university extension source for it: minimum night temperature. We don't estimate.
Growing tips
- Wait for 50°F soil: on the Front Range, early May in sandy soil to late May in clay. (Colorado State University Extension)
- Beans need the most water while flowering and filling pods. (Colorado State University Extension)
- Give about an inch of water a week. (Colorado State University Extension)
- Go easy on nitrogen; too much grows leaves instead of beans. (Colorado State University Extension)
- Do not crowd plants; a closed canopy invites disease. (Colorado State University Extension)
How the answer uses this
The planting window opens on the typical last frost date in your town and stays open while a planting still has 60 days to mature before the typical first fall frost. Inside the window the answer is Plant when the coldest of the next 7 nights stays above 32°F (no source gives a minimum night temperature, so the cold-damage temperature is used). Cover tonight shows when tonight's low is 32°F or colder while snap bean is normally in the ground.
Sources
- Colorado State University Extension — checked Nov 11, 2026
- Utah State University Extension — checked Nov 11, 2026
- Colorado State University Extension — checked Nov 11, 2026
Guidance only. Extension advice is written for typical conditions; your soil, variety and microclimate matter.