When to plant Celery in Colorado

In spring, from Apr 1 – 20 in Grand Junction to June 1 – 15 in Steamboat Springs.

In fall, from May 15 – June 15 in Steamboat Springs to June 1 – July 15 in Windsor.

Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.

Celery and celeriac planting dates by place in Colorado
PlaceSpringFall
ArvadaApr 15 – May 1June 1 – July 5
AuroraApr 20 – June 15June 1 – July 15
BerthoudApr 20 – June 15June 1 – July 5
BoulderApr 20 – June 15June 1 – July 5
BrightonApr 15 – May 1June 1 – July 15
BroomfieldApr 15 – May 1June 1 – July 15
Cañon CityApr 15 – May 1June 1 – July 15
Castle PinesApr 20 – June 15June 1 – July 5
Castle RockApr 20 – June 15June 1 – July 5
CentennialApr 15 – May 1June 1 – July 15
Colorado SpringsApr 15 – May 1June 1 – July 15
Commerce CityApr 15 – May 1June 1 – July 15
DenverApr 15 – May 1June 1 – July 15
DurangoMay 10 – June 15June 1 – July 5
EnglewoodApr 15 – May 1June 1 – July 15
ErieApr 20 – June 15June 1 – July 5
EvansApr 15 – May 1June 1 – July 15
Federal HeightsApr 15 – May 1June 1 – July 15
FirestoneApr 20 – June 15June 1 – July 5
Fort CollinsApr 15 – May 1June 1 – July 15
Fort MorganApr 20 – June 15June 1 – July 15
FountainApr 15 – May 1June 1 – July 15
FrederickApr 20 – June 15June 1 – July 5
FruitaApr 15 – May 1June 1 – July 15
Glenwood SpringsApr 20 – June 15June 1 – July 5
GoldenApr 15 – May 1June 1 – July 15
Grand JunctionApr 1 – 20June 1 – Aug 1
GreeleyApr 15 – May 1June 1 – July 15
Greenwood VillageApr 20 – June 15June 1 – July 15
JohnstownApr 20 – June 15June 1 – July 5
LafayetteApr 15 – May 1June 1 – July 15
LakewoodApr 15 – May 1June 1 – July 15
LittletonApr 15 – May 1June 1 – July 15
Lone TreeApr 15 – May 1June 1 – July 15
LongmontApr 20 – June 15June 1 – July 5
LouisvilleApr 20 – June 15June 1 – July 5
LovelandApr 20 – June 15June 1 – July 5
MontroseApr 15 – May 1June 1 – July 15
MonumentMay 10 – June 15June 1 – July 5
NorthglennApr 15 – May 1June 1 – July 15
ParkerApr 20 – June 15June 1 – July 5
PuebloApr 15 – May 1June 1 – July 15
RifleApr 20 – June 15June 1 – July 5
SeveranceApr 15 – May 1June 1 – July 15
Steamboat SpringsJune 1 – 15May 15 – June 15
SterlingApr 15 – May 1June 1 – July 15
SuperiorApr 20 – June 15June 1 – July 5
ThorntonApr 15 – May 1June 1 – July 15
TimnathApr 15 – May 1June 1 – July 15
WellingtonApr 15 – May 1June 1 – July 15
WestminsterApr 15 – May 1June 1 – July 15
Wheat RidgeApr 15 – May 1June 1 – July 5
WindsorApr 15 – May 1June 1 – July 15

Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for celery and celeriac.