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2023 Planting Calendar: When to Start Vegetable Seeds | The Old Farmer's Almanac

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Planting Calendar for Sidney, MT

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 Spring

On average, your last spring frost occurs on May 17 (at SIDNEY, MT climate station, elevation 1932 feet).
CropFrost Based on Frost Dates
Moon Based on Moon Dates
Start Seeds IndoorsPlant Seedlings
or Transplants
Start Seeds Outdoors
ArugulaN/AN/AFrost May 3-17
Moon May 3- 5
BasilFrost Mar 22-Apr 5
Moon Mar 22-Apr 5
Frost May 17-Jun 7
Moon May 19-Jun 3
N/A
BeetsN/AN/AFrost May 3-24
Moon May 6-18
Bell PeppersFrost Mar 7-22
Moon Mar 7
Frost May 24-Jun 7
Moon May 24-Jun 3
N/A
Bok ChoyFrost Apr 5-19
Moon Apr 5
Frost May 24-Jun 7
Moon May 24-Jun 3
N/A
BroccoliFrost Mar 22-Apr 5
Moon Mar 22-Apr 5
Frost Apr 19-May 10
Moon Apr 19-May 5
N/A
CabbageFrost Mar 22-Apr 5
Moon Mar 22-Apr 5
Frost Apr 19-May 3
Moon Apr 19-May 3
N/A
CantaloupesFrost Apr 19-26
Moon Apr 19-26
Frost May 31-Jun 14
Moon May 31-Jun 3
N/A
CarrotsN/AN/AFrost Apr 12-26
Moon Apr 12-18
CauliflowerFrost Mar 22-Apr 5
Moon Mar 22-Apr 5
Frost Apr 19-May 10
Moon Apr 19-May 5
N/A
CeleryFrost Mar 7-22
Moon Mar 7
Frost May 24-Jun 7
Moon May 24-Jun 3
N/A
ChivesN/AN/AFrost Apr 19-26
Moon Apr 19-26
Cilantro (Coriander)N/AN/AFrost May 17-31
Moon May 19-31
CollardsN/AN/AFrost Apr 19-May 3
Moon Apr 19-May 3
CornN/AN/AFrost May 31-Jun 21
Moon May 31-Jun 3, Jun 17-21
CucumbersFrost Apr 19-26
Moon Apr 19-26
Frost May 31-Jun 14
Moon May 31-Jun 3
N/A
DillN/AN/AFrost May 17-Jun 21
Moon May 19-Jun 3
EggplantsFrost Mar 22-Apr 5
Moon Mar 22-Apr 5
Frost May 31-Jun 14
Moon May 31-Jun 3
N/A
Fava Beans (Broad Beans)Frost Feb 21-Mar 7
Moon Feb 21-Mar 7
Frost Mar 29-Apr 19
Moon Mar 29-Apr 5, Apr 19
N/A
Green BeansN/AN/AFrost May 24-Jun 14
Moon May 24-Jun 3
Jalapeño PeppersFrost Mar 7-22
Moon Mar 7
Frost May 24-Jun 7
Moon May 24-Jun 3
N/A
KaleFrost Mar 22-Apr 5
Moon Mar 22-Apr 5
Frost Apr 19-May 10
Moon Apr 19-May 5
N/A
KohlrabiFrost Apr 5-19
Moon Apr 5
Frost Apr 26-May 3
Moon Apr 26-May 3
N/A
LettuceFrost Apr 5-19
Moon Apr 5
Frost May 3-31
Moon May 3- 5, May 19-31
N/A
OkraN/AN/AFrost May 31-Jun 14
Moon May 31-Jun 3
OnionsN/AN/AFrost Apr 19-May 10
Moon May 6-10
OreganoFrost Mar 7-Apr 5
Moon Mar 7, Mar 23-Apr 5
Frost May 17-Jun 7
Moon May 19-Jun 3
N/A
ParsleyN/AN/AFrost Apr 19-May 3
Moon Apr 19-May 3
ParsnipsN/AN/AFrost Apr 26-May 17
Moon May 6-17
PeasN/AN/AFrost Apr 5-26
Moon Apr 5, Apr 20-26
PotatoesN/AN/AFrost Apr 19-May 3
PumpkinsFrost Apr 26-May 10
Moon Apr 26-May 5
Frost May 31-Jun 14
Moon May 31-Jun 3
N/A
RadishesN/AN/AFrost Mar 22-Apr 12
Moon Apr 6-12
RosemaryFrost Mar 7-22
Moon Mar 7
Frost May 24-Jun 14
Moon May 24-Jun 3
N/A
SageFrost Mar 22-Apr 5
Moon Mar 22-Apr 5
Frost May 17-31
Moon May 19-31
N/A
SpinachN/AN/AFrost Apr 5-26
Moon Apr 5, Apr 20-26
Sweet PotatoesN/AN/AFrost Jun 7-21
Moon Jun 7-16
Swiss ChardFrost Apr 5-19
Moon Apr 5
Frost Apr 26-May 3
Moon Apr 26-May 3
N/A
ThymeFrost Mar 7-Apr 5
Moon Mar 7, Mar 23-Apr 5
Frost May 17-Jun 7
Moon May 19-Jun 3
N/A
TomatillosFrost Mar 22-Apr 5
Moon Mar 22-Apr 5
Frost Jun 7-21
Moon Jun 17-21
N/A
TomatoesFrost Mar 22-Apr 5
Moon Mar 22-Apr 5
Frost May 24-Jun 14
Moon May 24-Jun 3
N/A
TurnipsN/AN/AFrost Apr 19-May 10
Moon May 6-10
WatermelonsFrost Apr 19-26
Moon Apr 19-26
Frost May 31-Jun 14
Moon May 31-Jun 3
N/A
Winter SquashN/AN/AFrost May 31-Jun 28
Moon May 31-Jun 3, Jun 17-28
Zucchini and Summer SquashN/AN/AFrost May 31-Jun 28
Moon May 31-Jun 3, Jun 17-28

Planting Dates for Fall

On average, your first fall frost occurs on September 22 (at SIDNEY, MT climate station).
CropFrost Based on Frost Dates
Start Seeds Indoors by...Plant Seedlings Outdoors by...Start Seeds Outdoors by...
ArugulaN/AN/AFrost Aug 18
BeetsN/AN/AFrost Aug 8
Bell PeppersFrost Apr 9Frost June 7N/A
Bok ChoyN/AN/AFrost Aug 13
BroccoliFrost Jun 11Frost Jul 9N/A
CabbageFrost Jun 1Frost Jun 29N/A
CantaloupesN/AN/AFrost June 14
CarrotsN/AN/AFrost Aug 3
CauliflowerFrost Jun 11Frost Jul 9N/A
CeleryFrost Mar 31Frost Jun 9N/A
CollardsN/AN/AFrost Jul 24
CornN/AN/AFrost June 21
CucumbersN/AN/AFrost Jun 19
EggplantsFrost Apr 9Frost June 14N/A
Fava Beans (Broad Beans)N/AN/AFrost Jul 24
Green BeansN/AN/AFrost Jun 19
Jalapeño PeppersFrost Apr 29Frost Jun 24N/A
KaleFrost Jul 1Frost Jul 29N/A
KohlrabiN/AN/AFrost Aug 3
LettuceN/AN/AFrost Aug 13
OkraN/AN/AFrost Jun 14
ParsnipsN/AN/AFrost Jun 19
PeasN/AN/AFrost Jul 19
PotatoesN/AN/AFrost Jun 4
PumpkinsN/AN/AFrost June 14
RadishesN/AN/AFrost Aug 18
SpinachN/AN/AFrost Aug 28
Sweet PotatoesFrost Apr 20Frost June 21N/A
Swiss ChardN/AN/AFrost Aug 13
TomatillosN/AN/AFrost June 21
TomatoesFrost Apr 14Frost June 14N/A
TurnipsN/AN/AFrost Aug 13
WatermelonsN/AN/AFrost June 14
Winter SquashN/AN/AFrost June 28
Zucchini and Summer SquashN/AN/AFrost June 28
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