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Planting Calendar for Fort Belknap Agency, MT | Almanac.com
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Planting Calendar for Fort Belknap Agency, MT

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The planting calendar below tells you when to plant in the SPRING and also plant in the FALL, based on your zip code or postal code.

Spring Planting Calendar

Our spring planting calendar starts with the very first dates that you can plant (based on the last spring frost). But if you've missed these dates, no worries! This is why we've added "last planting dates" to our spring calendar; this is meant to help new gardeners understand that if they missed the first spring planting window, they could still get crops in the ground.

In fact, many crops with short maturity times (such as radishes) can be succession planted all the way through the summer in northern areas. However, note that some cool-seasons crops such as kale and lettuce do not grow well in hot temperatures, which can cause bolting issues.  For some gardeners, especially in the South, a break to avoid summer heat is needed, but they can start once the heat has passed. 

The dates provided are based on the number of weeks before or after frost, so we can provide a unique calendar to every user in the country. Thus, several crops (especially similar crops) may appear to have the same date. Kale and lettuce, for example, or dates for starting seeds, like broccoli and cabbage. 

Fall Planting Calendar

When we say "fall," we really mean planting in summer in time for a fall harvest. Think of this as a second summer! It's easy to keep the crops going if you've already prepared the soil! 

Many crops that would be started indoors for a spring crop can just be plunked into the soil directly for a fall crop. Not only is the soil already warm but also there are less pests and it tends to be rainier so you don't need to water as often. Some fall vegetables need to be harvested by the first frost, but many are frost-tolerant and even taste better after a kiss of fall frost!

See each plant's individual Growing Guide for more specific planting, plant care, and harvesting information.

Specifically, on the charts, there are different columns labeled as follows:

  1. Start Seeds Indoors: When to sow seeds indoors to get an early start on the season.
  2. Plant Seedlings Outdoors: When to put small seedlings that you grew indoors (OR starter plants that you bought at a garden nursery) in the outdoor soil.
  3. Start Seeds Outdoors: When to plant seeds directly into the outdoor soil.
  4. Last Date to Plant: You may plant any time from the "start seeds" dates until this "last date." Don't wait any longer, or the crop won't have time to get to harvest before fall/winter frosts.

The "Moon Dates" indicate the best planting dates based on Moon phases. You can learn more about this age-old technique below.

When N/A appears in the chart, that starting method is typically not recommended, although it is likely still possible. 

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Planting Dates for Spring

On average, your last spring frost occurs on May 21 (at FT BELKNAP 2 SW, MT climate station, elevation 2526 feet).
CropFrost Based on Frost Dates
Moon Based on Moon Dates
Start Seeds IndoorsPlant Seedlings
or Transplants
Start Seeds OutdoorsLast Date to Plant
ArugulaFrost Mar 26-Apr 9
Moon Apr 8-9
Frost Apr 30-May 14
Moon May 7-14
Frost Apr 23-30
Moon Apr 23
Aug 21
AsparagusN/AN/AFrost May 7-21
May 21
BasilFrost Apr 9-23
Moon Apr 9-23
Frost Jun 4-18
Moon Jun 6-18
Frost Jun 4-18
Moon Jun 6-18
Aug 7
BeetsN/AFrost May 7-21
Frost Apr 23-30
Moon Apr 24-30
Jun 4
Bell PeppersFrost Mar 12-26
Moon Mar 12-25
Frost Jun 4-11
Moon Jun 6-11
N/AJun 26
Bok ChoyFrost Apr 9-23
Moon Apr 9-23
Frost Jun 4-11
Moon Jun 6-11
Frost Jun 4-11
Moon Jun 6-11
Jul 2
BroccoliFrost Mar 26-Apr 9
Moon Apr 8-9
Frost May 7-21
Moon May 7-21
Frost Apr 23-30
Moon Apr 23
Jul 17
Brussels SproutsFrost Apr 9-23
Moon Apr 9-23
Frost May 7-21
Moon May 7-21
Frost Apr 23-30
Moon Apr 23
Jun 12
CabbageFrost Mar 26-Apr 9
Moon Apr 8-9
Frost May 7-21
Moon May 7-21
Frost Apr 23-30
Moon Apr 23
Jun 5
CantaloupesFrost Apr 30-May 14
Moon May 7-14
Frost May 21-Jun 4
Moon May 21-23
Frost May 28-Jun 4
Jun 12
CarrotsN/AN/AFrost Apr 23-May 7
Moon Apr 24-May 6
Jul 10
CauliflowerFrost Apr 9-23
Moon Apr 9-23
Frost May 14-28
Moon May 14-23
N/AJul 10
CeleryFrost Feb 26-Mar 12
Frost May 28-Jun 11
Moon Jun 6-11
Frost May 21
Moon May 21
Jul 10
ChivesFrost Mar 26-Apr 9
Moon Apr 8-9
Frost Apr 30-May 7
Moon May 7
Frost Apr 30-May 7
Moon May 7
Jul 24
Cilantro (Coriander)N/AN/AFrost May 21-Jun 4
Moon May 21-23
Jun 11
CollardsFrost Apr 9-23
Moon Apr 9-23
Frost May 7-21
Moon May 7-21
Frost Apr 30-May 7
Moon May 7
Jul 10
CucumbersFrost Apr 30-May 7
Moon May 7
Frost May 28-Jun 11
Moon Jun 6-11
Frost Jun 4-11
Moon Jun 6-11
Jul 10
DillN/AN/AFrost May 14-Jun 4
Moon May 14-23
Jul 24
Dry BeansN/AN/AFrost Jun 4-11
Moon Jun 6-11
Jun 12
EggplantsFrost Mar 26-Apr 9
Moon Apr 8-9
Frost Jun 4-11
Moon Jun 6-11
N/AJul 10
Fava BeansN/AN/AFrost Apr 23-30
Moon Apr 23
Jun 4
FennelFrost Apr 9-23
Moon Apr 9-23
Frost May 28-Jun 4
Frost May 21-Jun 4
Moon May 21-23
Jul 3
GarlicN/AN/AN/A
Green BeansN/AN/AFrost May 28-Jun 18
Moon Jun 6-18
Jul 10
Honeydew MelonsFrost Apr 30-May 7
Moon May 7
Frost Jun 4-11
Moon Jun 6-11
Frost Jun 4-11
Moon Jun 6-11
Jun 19
Jalapeño PeppersFrost Mar 12-26
Moon Mar 12-25
Frost Jun 4-11
Moon Jun 6-11
N/A
KaleFrost Mar 26-Apr 9
Moon Apr 8-9
Frost May 7-21
Moon May 7-21
Frost Apr 23-30
Moon Apr 23
Jun 4
KohlrabiFrost Apr 9-23
Moon Apr 9-23
Frost Apr 30-May 7
Moon May 7
Frost Apr 23-30
Moon Apr 23
Jun 4
LeeksFrost Mar 12-26
Moon Mar 12-25
Frost Apr 30-May 14
Moon May 7-14
N/AJun 5
LettuceFrost Apr 9-23
Moon Apr 9-23
Frost Apr 30-May 7
Moon May 7
Frost Apr 23-30
Moon Apr 23
Jun 4
Mustard GreensN/AN/AN/A
OkraFrost Apr 23-May 7
Moon Apr 23
Frost Jun 4-11
Moon Jun 6-11
Frost Jun 4-18
Moon Jun 6-18
Jul 10
OnionsN/AFrost Apr 23-May 7
Moon Apr 24-May 6
N/AJun 12
OreganoFrost Mar 12-Apr 9
Moon Mar 12-25, Apr 8-9
Frost May 28-Jun 11
Moon Jun 6-11
N/AJul 10
ParsleyFrost Mar 12-26
Moon Mar 12-25
Frost May 28-Jun 11
Moon Jun 6-11
Frost Apr 23-May 28
Moon Apr 23, May 8-23
Jul 3
ParsnipsN/AN/AFrost Apr 23-30
Moon Apr 24-30
Jun 12
PeasN/AN/AFrost Apr 23-30
Moon Apr 23
Jun 4
PotatoesN/AN/AFrost Apr 23-May 7
Moon Apr 24-May 6
Jul 10
PumpkinsFrost Apr 30-May 14
Moon May 7-14
Frost Jun 4-11
Moon Jun 6-11
Frost Jun 4-11
Moon Jun 6-11
Jun 5
RadishesN/AN/AFrost Apr 23-30
Moon Apr 24-30
Jul 24
RosemaryFrost Feb 26-Mar 12
Frost Jun 4-11
Moon Jun 6-11
N/AJul 24
SageFrost Mar 26-Apr 9
Moon Apr 8-9
Frost May 28-Jun 11
Moon Jun 6-11
N/AJul 3
SalsifyN/AN/AFrost Apr 23-May 7
Moon Apr 24-May 6
Jun 12
SpinachFrost Apr 9-23
Moon Apr 9-23
Frost Apr 30-May 7
Moon May 7
Frost Apr 23-30
Moon Apr 23
Jun 4
Sweet CornN/AN/AFrost Jun 4-18
Moon Jun 6-18
Jul 3
Sweet PotatoesN/AN/AFrost Jun 4-18
Moon Jun 4-5
Jun 5
Swiss ChardFrost Apr 9-23
Moon Apr 9-23
Frost May 7-21
Moon May 7-21
Frost Apr 30-May 21
Moon May 7-21
Jun 4
ThymeFrost Mar 12-26
Moon Mar 12-25
Frost May 28-Jun 4
N/AJun 26
TomatillosFrost Apr 9-23
Moon Apr 9-23
Frost Jun 4-18
Moon Jun 6-18
N/AJul 3
TomatoesFrost Mar 26-Apr 9
Moon Apr 8-9
Frost Jun 4-11
Moon Jun 6-11
N/AJun 19
TurnipsN/AN/AFrost Apr 23-30
Moon Apr 24-30
Aug 21
WatermelonsFrost Apr 30-May 14
Moon May 7-14
Frost Jun 4-11
Moon Jun 6-11
Frost May 28-Jun 4
Jun 19
Winter SquashFrost Apr 30-May 7
Moon May 7
Frost May 28-Jun 11
Moon Jun 6-11
Frost Jun 4-11
Moon Jun 6-11
May 29
Zucchini (Summer Squash)Frost Apr 30-May 7
Moon May 7
Frost May 28-Jun 11
Moon Jun 6-11
Frost Jun 4-11
Moon Jun 6-11
Jul 17

Planting Dates for Fall

On average, your first fall frost occurs on September 18 (at FT BELKNAP 2 SW, MT climate station).
CropFrost Based on Frost Dates
Moon Based on Moon Dates
Start Seeds OutdoorsTransplantAverage Days to MaturityFrost Tolerance
ArugulaFrost Jul 31-Sep 4
Moon Aug 4-19
N/A40Frost-hardy
BeetsFrost Jun 26-Jul 24
Moon Jun 26-Jul 4, Jul 22-24
N/A50Frost-tolerant
Bok ChoyFrost Jul 10-31
Moon Jul 10-21
N/A50Frost-tolerant
BroccoliFrost Jun 19-26
Moon Jun 19-21
Frost Jul 10-24
Moon Jul 10-21
60Frost-tolerant
Brussels SproutsFrost May 29-Jun 12
Moon Jun 6-12
N/A100Frost-hardy
CabbageFrost Jun 19-26
Moon Jun 19-21
Frost Jul 10-17
Moon Jul 10-17
90Frost-tolerant
CarrotsFrost Jul 3-10
Moon Jul 3-4
N/A70Frost-tolerant
CauliflowerFrost Jun 12-19
Moon Jun 12-19
Frost Jun 26-Jul 3
75Frost-tolerant
ChivesFrost Jun 26-Jul 24
Moon Jul 5-21
N/A70Frost-tolerant
FennelFrost Jun 19-Jul 3
Moon Jun 19-21
N/A80Tender
GarlicFrost Oct 2-16
N/A120Frost-hardy
Green BeansFrost Jul 3-17
Moon Jul 5-17
N/A55Tender
KaleFrost Jul 10-24
Moon Jul 10-21
N/A60Frost-hardy
KohlrabiFrost Jul 17-Aug 7
Moon Jul 17-21, Aug 4-7
N/A45Frost-tolerant
LettuceFrost Jul 10-24
Moon Jul 10-21
N/A60Frost-tolerant
Mustard GreensFrost Jul 17-Aug 7
Moon Jul 17-21, Aug 4-7
N/A45Tender
PeasFrost Jul 10-24
Moon Jul 10-21
N/A55Tender
RadishesFrost Aug 7-21
Moon Aug 20-21
N/A25Frost-tolerant
SpinachFrost Jul 31-Aug 21
Moon Aug 4-19
N/A30Frost-hardy
Swiss ChardFrost Jul 10-24
Moon Jul 10-21
N/A60Frost-tolerant
TurnipsFrost Jul 17-31
Moon Jul 22-31
N/A50Frost-tolerant
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