When to plant swiss chard in Colorado

Swiss chard
Sow outdoors in Denver
Apr 20–May 18

Across Colorado the window opens between March 31 and April 26. Find your city below; the dates follow each town's own average last frost.

Sow outdoors, Denver
Apr 20–May 18
Last frost, Denver
May 4

Sow outdoors from 2 weeks before to 2 weeks after the last frost. Cut outer leaves and the plant keeps going until hard frost.

Swiss chard planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost
JanFebMarAprMayJunJulAugSepOctNovDec
DenverApr 20–May 18
Colorado SpringsApr 19–May 17
AuroraApr 23–May 21
Fort CollinsApr 18–May 16
LakewoodApr 19–May 17
ThorntonApr 18–May 16
ArvadaApr 21–May 19
WestminsterApr 18–May 16
GreeleyApr 18–May 16
PuebloApr 16–May 14
CentennialApr 21–May 19
BoulderApr 22–May 20
LongmontApr 23–May 21
LovelandApr 26–May 24
BroomfieldApr 18–May 16
Commerce CityApr 19–May 17
Grand JunctionMar 31–Apr 28
LittletonApr 18–May 16
BrightonApr 19–May 17
WindsorApr 19–May 17
ErieApr 23–May 21
NorthglennApr 18–May 16
Security-WidefieldApr 19–May 17
EnglewoodApr 18–May 16
Pueblo WestApr 12–May 10
Wheat RidgeApr 21–May 19
LafayetteApr 18–May 16
FountainApr 19–May 17
EvansApr 18–May 16
JohnstownApr 26–May 24
All 34 cities
CitySow outdoorsLast frost
DenverApr 20 to May 18May 4
Colorado SpringsApr 19 to May 17May 3
AuroraApr 23 to May 21May 7
Fort CollinsApr 18 to May 16May 2
LakewoodApr 19 to May 17May 3
ThorntonApr 18 to May 16May 2
ArvadaApr 21 to May 19May 5
WestminsterApr 18 to May 16May 2
GreeleyApr 18 to May 16May 2
PuebloApr 16 to May 14Apr 30
CentennialApr 21 to May 19May 5
BoulderApr 22 to May 20May 6
LongmontApr 23 to May 21May 7
LovelandApr 26 to May 24May 10
BroomfieldApr 18 to May 16May 2
Commerce CityApr 19 to May 17May 3
Grand JunctionMar 31 to Apr 28Apr 14
LittletonApr 18 to May 16May 2
BrightonApr 19 to May 17May 3
WindsorApr 19 to May 17May 3
ErieApr 23 to May 21May 7
NorthglennApr 18 to May 16May 2
Security-WidefieldApr 19 to May 17May 3
EnglewoodApr 18 to May 16May 2
Pueblo WestApr 12 to May 10Apr 26
Wheat RidgeApr 21 to May 19May 5
LafayetteApr 18 to May 16May 2
FountainApr 19 to May 17May 3
EvansApr 18 to May 16May 2
JohnstownApr 26 to May 24May 10
Four Square MileApr 23 to May 21May 7
MontroseApr 14 to May 12Apr 28
LouisvilleApr 22 to May 20May 6
FirestoneApr 23 to May 21May 7

Questions

When should I plant swiss chard in Colorado?

In Denver, sow outdoors from April 20 to May 18. Across Colorado the window opens between March 31 and April 26, depending on the local last frost.

How is this date worked out?

Sow outdoors from 2 weeks before to 2 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.

More for Colorado

Swiss chard in other states

Frost dates for every city in Colorado