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2022 Planting Calendar: When to Start Vegetable Seeds | The Old Farmer's Almanac

Planting Calendar for Longmont, CO

For the Almanac's fall and spring planting calendars, we've calculated the best time to start seeds indoors, when to transplant young plants outside, and when to direct seed into the ground.

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Planting Dates for Fall

On average, your first fall frost occurs on October 1 (at LONGMONT 2 ESE, CO climate station).
CropFrost Based on Frost Dates
Start Seeds Indoors by...Plant Seedlings Outdoors by...Start Seeds Outdoors by...
ArugulaN/AN/AFrost Aug 27
BeetsN/AN/AFrost Aug 17
Bell PeppersFrost Apr 18Frost Jun 13N/A
BroccoliFrost Jun 20Frost Jul 18N/A
CabbageFrost Jun 10Frost Jul 8N/A
CantaloupesN/AN/AFrost June 10
CarrotsN/AN/AFrost Aug 12
CauliflowerFrost Jun 20Frost Jul 18N/A
CeleryFrost Apr 9Frost Jun 18N/A
CornN/AN/AFrost Jun 23
CucumbersN/AN/AFrost Jun 28
EggplantsFrost Apr 18Frost Jun 13N/A
Green BeansN/AN/AFrost Jun 28
Jalapeño PeppersFrost May 8Frost Jul 3N/A
KaleFrost Jul 10Frost Aug 7N/A
KohlrabiN/AN/AFrost Aug 12
LettuceN/AN/AFrost Aug 22
OkraN/AN/AFrost Jun 23
ParsnipsN/AN/AFrost Jun 28
PeasN/AN/AFrost Jul 28
PotatoesN/AN/AFrost Jul 18
PumpkinsN/AN/AFrost June 10
RadishesN/AN/AFrost Aug 27
SpinachN/AN/AFrost Sep 6
Sweet PotatoesFrost Apr 29Frost June 17N/A
Swiss ChardN/AN/AFrost Aug 22
TomatoesFrost Apr 23Frost Jun 18N/A
TurnipsN/AN/AFrost Aug 22
WatermelonsN/AN/AFrost June 10
Winter SquashN/AN/AFrost June 24
ZucchiniN/AN/AFrost Jul 3

Planting Dates for Spring

On average, your last spring frost occurs on May 13 (at LONGMONT 2 ESE, CO climate station, elevation 4950 feet).
CropFrost Based on Frost Dates
Moon Based on Moon Dates
Start Seeds IndoorsPlant Seedlings
or Transplants
Start Seeds Outdoors
ArugulaN/AN/AFrost Apr 29-May 13
Moon Apr 30-May 13
BasilFrost Mar 18-Apr 1
Moon Mar 18
Frost May 13-Jun 3
Moon May 13-15, May 30-Jun 3
N/A
BeetsN/AN/AFrost Apr 29-May 20
Moon Apr 29, May 16-20
Bell PeppersFrost Mar 3-18
Moon Mar 3-18
Frost May 20-Jun 3
Moon May 30-Jun 3
N/A
BroccoliFrost Mar 18-Apr 1
Moon Mar 18
Frost Apr 15-May 6
Moon Apr 15-16, Apr 30-May 6
N/A
CabbageFrost Mar 18-Apr 1
Moon Mar 18
Frost Apr 15-29
Moon Apr 15-16
N/A
CantaloupesFrost Apr 15-22
Moon Apr 15-16
Frost May 27-Jun 10
Moon May 30-Jun 10
N/A
CarrotsN/AN/AFrost Apr 8-22
Moon Apr 17-22
CauliflowerFrost Mar 18-Apr 1
Moon Mar 18
Frost Apr 15-May 6
Moon Apr 15-16, Apr 30-May 6
N/A
CeleryFrost Mar 3-18
Moon Mar 3-18
Frost May 20-Jun 3
Moon May 30-Jun 3
N/A
ChivesN/AN/AFrost Apr 15-22
Moon Apr 15-16
Cilantro (Coriander)N/AN/AFrost May 13-27
Moon May 13-15
CornN/AN/AFrost May 27-Jun 17
Moon May 30-Jun 14
CucumbersFrost Apr 15-22
Moon Apr 15-16
Frost May 27-Jun 10
Moon May 30-Jun 10
N/A
DillN/AN/AFrost May 13-Jun 17
Moon May 13-15, May 30-Jun 14
EggplantsFrost Mar 18-Apr 1
Moon Mar 18
Frost May 27-Jun 10
Moon May 30-Jun 10
N/A
Green BeansN/AN/AFrost May 20-Jun 10
Moon May 30-Jun 10
Jalapeño PeppersFrost Mar 3-18
Moon Mar 3-18
Frost May 20-Jun 3
Moon May 30-Jun 3
N/A
KaleFrost Mar 18-Apr 1
Moon Mar 18
Frost Apr 15-May 6
Moon Apr 15-16, Apr 30-May 6
N/A
KohlrabiFrost Apr 1-15
Moon Apr 1-15
Frost Apr 22-29
N/A
LettuceFrost Apr 1-15
Moon Apr 1-15
Frost Apr 29-May 27
Moon Apr 30-May 15
N/A
OkraN/AN/AFrost May 27-Jun 10
Moon May 30-Jun 10
OnionsN/AN/AFrost Apr 15-May 6
Moon Apr 17-29
OreganoFrost Mar 3-Apr 1
Moon Mar 3-18, Apr 1
Frost May 13-Jun 3
Moon May 13-15, May 30-Jun 3
N/A
ParsleyN/AN/AFrost Apr 15-29
Moon Apr 15-16
ParsnipsN/AN/AFrost Apr 22-May 13
Moon Apr 22-29
PeasN/AN/AFrost Apr 1-22
Moon Apr 1-16
PotatoesN/AN/AFrost May 6-27
Moon May 16-27
PumpkinsFrost Apr 22-May 6
Moon Apr 30-May 6
Frost May 27-Jun 10
Moon May 30-Jun 10
N/A
RadishesN/AN/AFrost Mar 18-Apr 8
Moon Mar 19-31
RosemaryFrost Mar 3-18
Moon Mar 3-18
Frost May 20-Jun 10
Moon May 30-Jun 10
N/A
SageFrost Mar 18-Apr 1
Moon Mar 18
Frost May 13-27
Moon May 13-15
N/A
SpinachN/AN/AFrost Apr 1-22
Moon Apr 1-16
Sweet PotatoesN/AN/AFrost Jun 3-17
Moon Jun 15-17
Swiss ChardFrost Apr 1-15
Moon Apr 1-15
Frost Apr 22-29
N/A
ThymeFrost Mar 3-Apr 1
Moon Mar 3-18, Apr 1
Frost May 13-Jun 3
Moon May 13-15, May 30-Jun 3
N/A
TomatoesFrost Mar 18-Apr 1
Moon Mar 18
Frost May 20-Jun 10
Moon May 30-Jun 10
N/A
TurnipsN/AN/AFrost Apr 15-May 6
Moon Apr 17-29
WatermelonsFrost Apr 15-22
Moon Apr 15-16
Frost May 27-Jun 10
Moon May 30-Jun 10
N/A
Winter SquashN/AN/AFrost May 27-Jun 24
Moon May 30-Jun 14
ZucchiniN/AN/AFrost May 27-Jun 24
Moon May 30-Jun 14