When to plant green beans in Colorado

Green beans
Sow outdoors in Denver
May 11–Jun 1

Across Colorado the window opens between April 21 and May 17. Find your city below; the dates follow each town's own average last frost.

Sow outdoors, Denver
May 11–Jun 1
Last sowing for a harvest
Jul 26
Last frost, Denver
May 4

Sow outdoors 1–4 weeks after the last frost. Bush beans ripen all at once, so sow a new row every two to three weeks.

Green beans planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
DenverMay 11–Jun 1
Colorado SpringsMay 10–May 31
AuroraMay 14–Jun 4
Fort CollinsMay 9–May 30
LakewoodMay 10–May 31
ThorntonMay 9–May 30
ArvadaMay 12–Jun 2
WestminsterMay 9–May 30
GreeleyMay 9–May 30
PuebloMay 7–May 28
CentennialMay 12–Jun 2
BoulderMay 13–Jun 3
LongmontMay 14–Jun 4
LovelandMay 17–Jun 7
BroomfieldMay 9–May 30
Commerce CityMay 10–May 31
Grand JunctionApr 21–May 12
LittletonMay 9–May 30
BrightonMay 10–May 31
WindsorMay 10–May 31
ErieMay 14–Jun 4
NorthglennMay 9–May 30
Security-WidefieldMay 10–May 31
EnglewoodMay 9–May 30
Pueblo WestMay 3–May 24
Wheat RidgeMay 12–Jun 2
LafayetteMay 9–May 30
FountainMay 10–May 31
EvansMay 9–May 30
JohnstownMay 17–Jun 7
All 34 cities
CitySow outdoorsLast frost
DenverMay 11 to Jun 1May 4
Colorado SpringsMay 10 to May 31May 3
AuroraMay 14 to Jun 4May 7
Fort CollinsMay 9 to May 30May 2
LakewoodMay 10 to May 31May 3
ThorntonMay 9 to May 30May 2
ArvadaMay 12 to Jun 2May 5
WestminsterMay 9 to May 30May 2
GreeleyMay 9 to May 30May 2
PuebloMay 7 to May 28Apr 30
CentennialMay 12 to Jun 2May 5
BoulderMay 13 to Jun 3May 6
LongmontMay 14 to Jun 4May 7
LovelandMay 17 to Jun 7May 10
BroomfieldMay 9 to May 30May 2
Commerce CityMay 10 to May 31May 3
Grand JunctionApr 21 to May 12Apr 14
LittletonMay 9 to May 30May 2
BrightonMay 10 to May 31May 3
WindsorMay 10 to May 31May 3
ErieMay 14 to Jun 4May 7
NorthglennMay 9 to May 30May 2
Security-WidefieldMay 10 to May 31May 3
EnglewoodMay 9 to May 30May 2
Pueblo WestMay 3 to May 24Apr 26
Wheat RidgeMay 12 to Jun 2May 5
LafayetteMay 9 to May 30May 2
FountainMay 10 to May 31May 3
EvansMay 9 to May 30May 2
JohnstownMay 17 to Jun 7May 10
Four Square MileMay 14 to Jun 4May 7
MontroseMay 5 to May 26Apr 28
LouisvilleMay 13 to Jun 3May 6
FirestoneMay 14 to Jun 4May 7

Questions

When should I plant green beans in Colorado?

In Denver, sow outdoors from May 11 to June 1. Across Colorado the window opens between April 21 and May 17, depending on the local last frost.

How is this date worked out?

Sow outdoors 1–4 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Colorado

Green beans in other states

Frost dates for every city in Colorado