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Planting Calendar for Eureka, 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-season 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 17 (at EUREKA RS, MT climate station, elevation 2532 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 22-Apr 5
Moon Mar 22-25
Frost Apr 26-May 10
Moon May 7-10
Frost Apr 19-26
Moon Apr 19-23
Aug 24
AsparagusN/AN/AFrost May 3-17
Moon May 3-6
May 17
BasilFrost Apr 5-19
Moon Apr 8-19
Frost May 31-Jun 14
Moon Jun 6-14
Frost May 31-Jun 14
Moon Jun 6-14
Aug 10
BeetsN/AFrost May 3-17
Moon May 3-6
Frost Apr 19-26
Moon Apr 24-26
May 31
Bell PeppersFrost Mar 7-22
Frost May 31-Jun 7
Moon Jun 6-7
N/AJun 29
Bok ChoyFrost Apr 5-19
Moon Apr 8-19
Frost May 31-Jun 7
Moon Jun 6-7
Frost May 31-Jun 7
Moon Jun 6-7
Jun 28
BroccoliFrost Mar 22-Apr 5
Moon Mar 22-25
Frost May 3-17
Moon May 7-17
Frost Apr 19-26
Moon Apr 19-23
Jul 20
Brussels SproutsFrost Apr 5-19
Moon Apr 8-19
Frost May 3-17
Moon May 7-17
Frost Apr 19-26
Moon Apr 19-23
Jun 15
CabbageFrost Mar 22-Apr 5
Moon Mar 22-25
Frost May 3-17
Moon May 7-17
Frost Apr 19-26
Moon Apr 19-23
Jun 8
CantaloupesFrost Apr 26-May 10
Moon May 7-10
Frost May 17-31
Moon May 17-23
Frost May 24-31
Jun 15
CarrotsN/AN/AFrost Apr 19-May 3
Moon Apr 24-May 3
Jul 13
CauliflowerFrost Apr 5-19
Moon Apr 8-19
Frost May 10-24
Moon May 10-23
N/AJul 13
CeleryFrost Feb 22-Mar 7
Moon Feb 22-24
Frost May 24-Jun 7
Moon Jun 6-7
Frost May 17
Moon May 17
Jul 13
ChivesFrost Mar 22-Apr 5
Moon Mar 22-25
Frost Apr 26-May 3
Frost Apr 26-May 3
Jul 27
Cilantro (Coriander)N/AN/AFrost May 17-31
Moon May 17-23
Jun 7
CollardsFrost Apr 5-19
Moon Apr 8-19
Frost May 3-17
Moon May 7-17
Frost Apr 26-May 3
Jul 13
CucumbersFrost Apr 26-May 3
Frost May 24-Jun 7
Moon Jun 6-7
Frost May 31-Jun 7
Moon Jun 6-7
Jul 13
DillN/AN/AFrost May 10-31
Moon May 10-23
Jul 27
Dry BeansN/AN/AFrost May 31-Jun 7
Moon Jun 6-7
Jun 15
EggplantsFrost Mar 22-Apr 5
Moon Mar 22-25
Frost May 31-Jun 7
Moon Jun 6-7
N/AJul 13
Fava BeansN/AN/AFrost Apr 19-26
Moon Apr 19-23
May 31
FennelFrost Apr 5-19
Moon Apr 8-19
Frost May 24-31
Frost May 17-31
Moon May 17-23
Jul 6
GarlicN/AN/AN/A
Green BeansN/AN/AFrost May 24-Jun 14
Moon Jun 6-14
Jul 13
Honeydew MelonsFrost Apr 26-May 3
Frost May 31-Jun 7
Moon Jun 6-7
Frost May 31-Jun 7
Moon Jun 6-7
Jun 22
Jalapeño PeppersFrost Mar 7-22
Frost May 31-Jun 7
Moon Jun 6-7
N/A
KaleFrost Mar 22-Apr 5
Moon Mar 22-25
Frost May 3-17
Moon May 7-17
Frost Apr 19-26
Moon Apr 19-23
May 31
KohlrabiFrost Apr 5-19
Moon Apr 8-19
Frost Apr 26-May 3
Frost Apr 19-26
Moon Apr 19-23
May 31
LeeksFrost Mar 7-22
Frost Apr 26-May 10
Moon May 7-10
N/AJun 8
LettuceFrost Apr 5-19
Moon Apr 8-19
Frost Apr 26-May 3
Frost Apr 19-26
Moon Apr 19-23
May 31
Mustard GreensN/AN/AN/A
OkraFrost Apr 19-May 3
Moon Apr 19-23
Frost May 31-Jun 7
Moon Jun 6-7
Frost May 31-Jun 14
Moon Jun 6-14
Jul 13
OnionsN/AFrost Apr 19-May 3
Moon Apr 24-May 3
N/AJun 15
OreganoFrost Mar 7-Apr 5
Moon Mar 23-25
Frost May 24-Jun 7
Moon Jun 6-7
N/AJul 13
ParsleyFrost Mar 7-22
Frost May 24-Jun 7
Moon Jun 6-7
Frost Apr 19-May 24
Moon Apr 19-23, May 7-23
Jul 6
ParsnipsN/AN/AFrost Apr 19-26
Moon Apr 24-26
Jun 15
PeanutsN/AN/AFrost Jun 7-21
PeasN/AN/AFrost Apr 19-26
Moon Apr 19-23
May 31
PotatoesN/AN/AFrost Apr 19-May 3
Moon Apr 24-May 3
Jul 13
PumpkinsFrost Apr 26-May 10
Moon May 7-10
Frost May 31-Jun 7
Moon Jun 6-7
Frost May 31-Jun 7
Moon Jun 6-7
Jun 8
RadishesN/AN/AFrost Apr 19-26
Moon Apr 24-26
Jul 27
RosemaryFrost Feb 22-Mar 7
Moon Feb 22-24
Frost May 31-Jun 7
Moon Jun 6-7
N/AJul 27
SageFrost Mar 22-Apr 5
Moon Mar 22-25
Frost May 24-Jun 7
Moon Jun 6-7
N/AJul 6
SalsifyN/AN/AFrost Apr 19-May 3
Moon Apr 24-May 3
Jun 15
SpinachFrost Apr 5-19
Moon Apr 8-19
Frost Apr 26-May 3
Frost Apr 19-26
Moon Apr 19-23
May 31
Sweet CornN/AN/AFrost May 31-Jun 14
Moon Jun 6-14
Jul 6
Sweet PotatoesN/AN/AFrost May 31-Jun 14
Moon May 31-Jun 5
Jun 8
Swiss ChardFrost Apr 5-19
Moon Apr 8-19
Frost May 3-17
Moon May 7-17
Frost Apr 26-May 17
Moon May 7-17
May 31
ThymeFrost Mar 7-22
Frost May 24-31
N/AJun 29
TomatillosFrost Apr 5-19
Moon Apr 8-19
Frost May 31-Jun 14
Moon Jun 6-14
N/AJul 6
TomatoesFrost Mar 22-Apr 5
Moon Mar 22-25
Frost May 31-Jun 7
Moon Jun 6-7
N/AJun 22
TurnipsN/AN/AFrost Apr 19-26
Moon Apr 24-26
Aug 24
WatermelonsFrost Apr 26-May 10
Moon May 7-10
Frost May 31-Jun 7
Moon Jun 6-7
Frost May 24-31
Jun 22
Winter SquashFrost Apr 26-May 3
Frost May 24-Jun 7
Moon Jun 6-7
Frost May 31-Jun 7
Moon Jun 6-7
Jun 1
Zucchini (Summer Squash)Frost Apr 26-May 3
Frost May 24-Jun 7
Moon Jun 6-7
Frost May 31-Jun 7
Moon Jun 6-7
Jul 20

Planting Dates for Fall

On average, your first fall frost occurs on September 21 (at EUREKA RS, MT climate station).
CropFrost Based on Frost Dates
Moon Based on Moon Dates
Start Seeds OutdoorsTransplantAverage Days to MaturityFrost Tolerance
ArugulaFrost Aug 3-Sep 7
Moon Aug 4-19
N/A40Frost-hardy
BeetsFrost Jun 29-Jul 27
Moon Jun 29-Jul 4, Jul 22-27
N/A50Frost-tolerant
Bok ChoyFrost Jul 13-Aug 3
Moon Jul 13-21
N/A50Frost-tolerant
BroccoliFrost Jun 22-29
Frost Jul 13-27
Moon Jul 13-21
60Frost-tolerant
Brussels SproutsFrost Jun 1-15
Moon Jun 6-15
N/A100Frost-hardy
CabbageFrost Jun 22-29
Frost Jul 13-20
Moon Jul 13-20
90Frost-tolerant
CarrotsFrost Jul 6-13
N/A70Frost-tolerant
CauliflowerFrost Jun 15-22
Moon Jun 15-21
Frost Jun 29-Jul 6
Moon Jul 5-6
75Frost-tolerant
ChivesFrost Jun 29-Jul 27
Moon Jul 5-21
N/A70Frost-tolerant
FennelFrost Jun 22-Jul 6
Moon Jul 5-6
N/A80Tender
GarlicFrost Oct 5-19
Moon Oct 18-19
N/A120Frost-hardy
Green BeansFrost Jul 6-20
Moon Jul 6-20
N/A55Tender
KaleFrost Jul 13-27
Moon Jul 13-21
N/A60Frost-hardy
KohlrabiFrost Jul 20-Aug 10
Moon Jul 20-21, Aug 4-10
N/A45Frost-tolerant
LettuceFrost Jul 13-27
Moon Jul 13-21
N/A60Frost-tolerant
Mustard GreensFrost Jul 20-Aug 10
Moon Jul 20-21, Aug 4-10
N/A45Tender
PeasFrost Jul 13-27
Moon Jul 13-21
N/A55Tender
RadishesFrost Aug 10-24
Moon Aug 20-24
N/A25Frost-tolerant
SpinachFrost Aug 3-24
Moon Aug 4-19
N/A30Frost-hardy
Swiss ChardFrost Jul 13-27
Moon Jul 13-21
N/A60Frost-tolerant
TurnipsFrost Jul 20-Aug 3
Moon Jul 22-Aug 3
N/A50Frost-tolerant
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