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Planting Calendar for Manhattan, MT | Almanac.com

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Planting Calendar for Manhattan, 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.

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're 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 also 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.

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 can 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 tempertures, 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. 

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 Fall

On average, your first fall frost occurs on September 9 (at LOGAN LANDFILL, MT climate station).
CropFrost Based on Frost Dates
Moon Based on Moon Dates
Start Seeds OutdoorsTransplantAverage Days to MaturityFrost Tolerance
ArugulaFrost Jul 22-Aug 26
Moon Jul 22-Aug 1, Aug 16-26
N/A40Frost-hardy
BeetsFrost Jun 17-Jul 15
Moon Jul 4-15
N/A50Frost-tolerant
Bok ChoyFrost Jul 1-22
Moon Jul 1- 3, Jul 17-22
N/A50Frost-tolerant
BroccoliFrost Jun 10-17
Moon Jun 17
Frost Jul 1-15
Moon Jul 1- 3
60Frost-tolerant
CabbageFrost Jun 10-17
Moon Jun 17
Frost Jul 1- 8
Moon Jul 1- 3
90Frost-tolerant
CarrotsFrost Jun 24-Jul 1
N/A70Frost-tolerant
CauliflowerFrost Jun 3-10
Moon Jun 3
Frost Jun 17-24
Moon Jun 17-24
75Frost-tolerant
ChivesFrost Jun 17-Jul 15
Moon Jun 17-Jul 3
N/A70Frost-tolerant
GarlicFrost Sep 23-Oct 7
Moon Sep 30-Oct 7
N/A120Frost-hardy
Green BeansFrost Jun 24-Jul 8
Moon Jun 24-Jul 3
N/A55Tender
KaleFrost Jul 1-15
Moon Jul 1- 3
N/A60Frost-hardy
KohlrabiFrost Jul 8-29
Moon Jul 17-29
N/A45Frost-tolerant
LettuceFrost Jul 1-15
Moon Jul 1- 3
N/A60Frost-tolerant
PeasFrost Jul 1-15
Moon Jul 1- 3
N/A55Tender
RadishesFrost Jul 29-Aug 12
Moon Aug 2-12
N/A25Frost-tolerant
SpinachFrost Jul 22-Aug 12
Moon Jul 22-Aug 1
N/A30Frost-hardy
Swiss ChardFrost Jul 1-15
Moon Jul 1- 3
N/A60Frost-tolerant
TurnipsFrost Jul 8-22
Moon Jul 8-16
N/A50Frost-tolerant

Planting Dates for Spring

On average, your last spring frost occurs on June 1 (at LOGAN LANDFILL, MT climate station, elevation 4242 feet).
CropFrost Based on Frost Dates
Moon Based on Moon Dates
Start Seeds IndoorsPlant Seedlings
or Transplants
Start Seeds OutdoorsLast Date to Plant
ArugulaFrost Apr 6-20
Moon Apr 19-20
Frost May 11-25
Moon May 19-25
Frost May 4-11
Moon May 4- 5
Aug 12
AsparagusN/AN/AFrost May 18-Jun 1
Moon May 18
Jun 1
BasilFrost Apr 20-May 4
Moon Apr 20-May 4
Frost Jun 15-29
Moon Jun 17-29
Frost Jun 15-29
Moon Jun 17-29
Jul 29
BeetsN/AFrost May 18-Jun 1
Moon May 18
Frost May 4-11
Moon May 6-11
Jun 15
Bell PeppersFrost Mar 23-Apr 6
Moon Mar 23-Apr 5
Frost Jun 15-22
Moon Jun 17-22
N/AJun 17
Bok ChoyFrost Apr 20-May 4
Moon Apr 20-May 4
Frost Jun 15-22
Moon Jun 17-22
Frost Jun 15-22
Moon Jun 17-22
Jul 13
BroccoliFrost Apr 6-20
Moon Apr 19-20
Frost May 18-Jun 1
Moon May 19-Jun 1
Frost May 4-11
Moon May 4- 5
Jul 8
Brussels SproutsFrost Apr 20-May 4
Moon Apr 20-May 4
Frost Feb 22-Mar 8
Moon Feb 22-Mar 7
Frost Jan 25-Feb 8
Moon Jan 25-Feb 5
Jun 3
CabbageFrost Apr 6-20
Moon Apr 19-20
Frost May 18-Jun 1
Moon May 19-Jun 1
Frost May 4-11
Moon May 4- 5
May 27
CantaloupesFrost May 11-25
Moon May 19-25
Frost Jun 1-15
Moon Jun 1- 3
Frost Jun 8-15
Jun 3
CarrotsN/AN/AFrost May 4-18
Moon May 6-18
Jul 1
CauliflowerFrost Apr 20-May 4
Moon Apr 20-May 4
Frost May 25-Jun 8
Moon May 25-Jun 3
N/AJul 1
CeleryFrost Mar 8-23
Moon Mar 21-23
Frost Jun 8-22
Moon Jun 17-22
Frost Jun 1
Moon Jun 1
Jul 1
ChivesFrost Apr 6-20
Moon Apr 19-20
Frost May 11-18
Frost May 11-18
Jul 15
Cilantro (Coriander)N/AN/AFrost Jun 1-15
Moon Jun 1- 3
Jun 22
CollardsFrost Apr 20-May 4
Moon Apr 20-May 4
Frost May 18-Jun 1
Moon May 19-Jun 1
Frost May 11-18
Jul 1
CornN/AN/AFrost Jun 15-29
Moon Jun 17-29
Jun 24
CucumbersFrost May 11-18
Frost Jun 8-22
Moon Jun 17-22
Frost Jun 15-22
Moon Jun 17-22
Jul 1
DillN/AN/AFrost May 25-Jun 15
Moon May 25-Jun 3
Jul 15
EggplantsFrost Apr 6-20
Moon Apr 19-20
Frost Jun 15-22
Moon Jun 17-22
N/AJul 1
Fava Beans (Broad Beans)N/AN/AFrost May 4-11
Moon May 4- 5
Jun 15
GarlicN/AN/AN/A
Green BeansN/AN/AFrost Jun 8-29
Moon Jun 17-29
Jul 1
Jalapeño PeppersFrost Mar 23-Apr 6
Moon Mar 23-Apr 5
Frost Jun 15-22
Moon Jun 17-22
N/A
KaleFrost Apr 6-20
Moon Apr 19-20
Frost May 18-Jun 1
Moon May 19-Jun 1
Frost May 4-11
Moon May 4- 5
Jun 15
KohlrabiFrost Apr 20-May 4
Moon Apr 20-May 4
Frost May 11-18
Frost May 4-11
Moon May 4- 5
Jun 15
LettuceFrost Apr 20-May 4
Moon Apr 20-May 4
Frost May 11-18
Frost May 4-11
Moon May 4- 5
Jun 15
OkraFrost May 4-18
Moon May 4- 5
Frost Jun 15-22
Moon Jun 17-22
Frost Jun 15-29
Moon Jun 17-29
Jul 1
Onion SetsN/AFrost May 4-18
Moon May 6-18
N/AJun 3
OreganoFrost Mar 23-Apr 20
Moon Mar 23-Apr 5, Apr 19-20
Frost Jun 8-22
Moon Jun 17-22
N/AJul 1
ParsleyFrost Mar 23-Apr 6
Moon Mar 23-Apr 5
Frost Jun 8-22
Moon Jun 17-22
Frost May 4-Jun 8
Moon May 4- 5, May 19-Jun 3
Jun 24
ParsnipsN/AN/AFrost May 4-11
Moon May 6-11
Jun 3
PeasN/AN/AFrost May 4-11
Moon May 4- 5
Jun 15
PotatoesN/AN/AFrost May 4-18
Moon May 6-18
Jul 1
PumpkinsFrost May 11-25
Moon May 19-25
Frost Jun 15-22
Moon Jun 17-22
Frost Jun 15-22
Moon Jun 17-22
May 27
RadishesN/AN/AFrost May 4-11
Moon May 6-11
Jul 15
RosemaryFrost Mar 8-23
Moon Mar 21-23
Frost Jun 15-22
Moon Jun 17-22
N/AJul 15
SageFrost Apr 6-20
Moon Apr 19-20
Frost Jun 8-22
Moon Jun 17-22
N/AJun 24
SpinachFrost Apr 20-May 4
Moon Apr 20-May 4
Frost May 11-18
Frost May 4-11
Moon May 4- 5
Jun 15
Sweet PotatoesN/AN/AFrost Jun 15-29
Moon Jun 15-16
May 27
Swiss ChardFrost Apr 20-May 4
Moon Apr 20-May 4
Frost May 18-Jun 1
Moon May 19-Jun 1
Frost May 11-Jun 1
Moon May 19-Jun 1
Jun 15
ThymeFrost Mar 23-Apr 6
Moon Mar 23-Apr 5
Frost Jun 8-15
N/AJun 17
TomatillosFrost Apr 20-May 4
Moon Apr 20-May 4
Frost Jun 15-29
Moon Jun 17-29
N/AJun 24
TomatoesFrost Apr 6-20
Moon Apr 19-20
Frost Jun 15-22
Moon Jun 17-22
N/AJun 10
TurnipsN/AN/AFrost May 4-11
Moon May 6-11
Aug 12
WatermelonsFrost May 11-25
Moon May 19-25
Frost Jun 15-22
Moon Jun 17-22
Frost Jun 8-15
Jun 10
Winter SquashFrost May 11-18
Frost Jun 8-22
Moon Jun 17-22
Frost Jun 15-22
Moon Jun 17-22
May 20
Zucchini and Summer SquashFrost May 11-18
Frost Jun 8-22
Moon Jun 17-22
Frost Jun 15-22
Moon Jun 17-22
Jul 8
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