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Planting Calendar for Twin Lakes, Lake County, CO | Almanac.com
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Planting Calendar for Twin Lakes, CO

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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 June 21 (at TWIN LAKES RSVR, CO climate station, elevation 9235 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 26-May 10
Moon May 7-10
Frost May 31-Jun 14
Moon Jun 6-14
Frost May 24-31
Aug 7
AsparagusN/AN/AFrost Jun 7-21
Jun 21
BasilFrost May 10-24
Moon May 10-23
Frost Jul 5-19
Moon Jul 5-19
Frost Jul 5-19
Moon Jul 5-19
Jul 24
BeetsN/AFrost Jun 7-21
Frost May 24-31
Moon May 24-31
Jul 5
Bell PeppersFrost Apr 12-26
Moon Apr 12-23
Frost Jul 5-12
Moon Jul 5-12
N/AJun 12
Bok ChoyFrost May 10-24
Moon May 10-23
Frost Jul 5-12
Moon Jul 5-12
Frost Jul 5-12
Moon Jul 5-12
Aug 2
BroccoliFrost Apr 26-May 10
Moon May 7-10
Frost Jun 7-21
Moon Jun 7-21
Frost May 24-31
Jul 3
Brussels SproutsFrost May 10-24
Moon May 10-23
Frost Jun 7-21
Moon Jun 7-21
Frost May 24-31
May 29
CabbageFrost Apr 26-May 10
Moon May 7-10
Frost Jun 7-21
Moon Jun 7-21
Frost May 24-31
May 22
CantaloupesFrost May 31-Jun 14
Moon Jun 6-14
Frost Jun 21-Jul 5
Moon Jun 21
Frost Jun 28-Jul 5
Moon Jul 5
May 29
CarrotsN/AN/AFrost May 24-Jun 7
Moon May 24-Jun 5
Jun 26
CauliflowerFrost May 10-24
Moon May 10-23
Frost Jun 14-28
Moon Jun 14-21
N/AJun 26
CeleryFrost Mar 29-Apr 12
Moon Apr 8-12
Frost Jun 28-Jul 12
Moon Jul 5-12
Frost Jun 21
Moon Jun 21
Jun 26
ChivesFrost 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
Jul 10
Cilantro (Coriander)N/AN/AFrost Jun 21-Jul 5
Moon Jun 21
Jul 12
CollardsFrost May 10-24
Moon May 10-23
Frost Jun 7-21
Moon Jun 7-21
Frost May 31-Jun 7
Moon Jun 6-7
Jun 26
CucumbersFrost May 31-Jun 7
Moon Jun 6-7
Frost Jun 28-Jul 12
Moon Jul 5-12
Frost Jul 5-12
Moon Jul 5-12
Jun 26
DillN/AN/AFrost Jun 14-Jul 5
Moon Jun 14-21, Jul 5
Jul 10
Dry BeansN/AN/AFrost Jul 5-12
Moon Jul 5-12
May 29
EggplantsFrost Apr 26-May 10
Moon May 7-10
Frost Jul 5-12
Moon Jul 5-12
N/AJun 26
Fava BeansN/AN/AFrost May 24-31
Jul 5
FennelFrost May 10-24
Moon May 10-23
Frost Jun 28-Jul 5
Moon Jul 5
Frost Jun 21-Jul 5
Moon Jun 21
Jun 19
GarlicN/AN/AN/A
Green BeansN/AN/AFrost Jun 28-Jul 19
Moon Jul 5-19
Jun 26
Honeydew MelonsFrost May 31-Jun 7
Moon Jun 6-7
Frost Jul 5-12
Moon Jul 5-12
Frost Jul 5-12
Moon Jul 5-12
Jun 5
Jalapeño PeppersFrost Apr 12-26
Moon Apr 12-23
Frost Jul 5-12
Moon Jul 5-12
N/A
KaleFrost Apr 26-May 10
Moon May 7-10
Frost Jun 7-21
Moon Jun 7-21
Frost May 24-31
Jul 5
KohlrabiFrost May 10-24
Moon May 10-23
Frost May 31-Jun 7
Moon Jun 6-7
Frost May 24-31
Jul 5
LeeksFrost Apr 12-26
Moon Apr 12-23
Frost May 31-Jun 14
Moon Jun 6-14
N/AMay 22
LettuceFrost May 10-24
Moon May 10-23
Frost May 31-Jun 7
Moon Jun 6-7
Frost May 24-31
Jul 5
Mustard GreensN/AN/AN/A
OkraFrost May 24-Jun 7
Moon Jun 6-7
Frost Jul 5-12
Moon Jul 5-12
Frost Jul 5-19
Moon Jul 5-19
Jun 26
OnionsN/AFrost May 24-Jun 7
Moon May 24-Jun 5
N/AMay 29
OreganoFrost Apr 12-May 10
Moon Apr 12-23, May 7-10
Frost Jun 28-Jul 12
Moon Jul 5-12
N/AJun 26
ParsleyFrost Apr 12-26
Moon Apr 12-23
Frost Jun 28-Jul 12
Moon Jul 5-12
Frost May 24-Jun 28
Moon Jun 6-21
Jun 19
ParsnipsN/AN/AFrost May 24-31
Moon May 24-31
May 29
PeasN/AN/AFrost May 24-31
Jul 5
PotatoesN/AN/AFrost May 24-Jun 7
Moon May 24-Jun 5
Jun 26
PumpkinsFrost May 31-Jun 14
Moon Jun 6-14
Frost Jul 5-12
Moon Jul 5-12
Frost Jul 5-12
Moon Jul 5-12
May 22
RadishesN/AN/AFrost May 24-31
Moon May 24-31
Jul 10
RosemaryFrost Mar 29-Apr 12
Moon Apr 8-12
Frost Jul 5-12
Moon Jul 5-12
N/AJul 10
SageFrost Apr 26-May 10
Moon May 7-10
Frost Jun 28-Jul 12
Moon Jul 5-12
N/AJun 19
SalsifyN/AN/AFrost May 24-Jun 7
Moon May 24-Jun 5
May 29
SpinachFrost May 10-24
Moon May 10-23
Frost May 31-Jun 7
Moon Jun 6-7
Frost May 24-31
Jul 5
Sweet CornN/AN/AFrost Jul 5-19
Moon Jul 5-19
Jun 19
Sweet PotatoesN/AN/AFrost Jul 5-19
May 22
Swiss ChardFrost May 10-24
Moon May 10-23
Frost Jun 7-21
Moon Jun 7-21
Frost May 31-Jun 21
Moon Jun 6-21
Jul 5
ThymeFrost Apr 12-26
Moon Apr 12-23
Frost Jun 28-Jul 5
Moon Jul 5
N/AJun 12
TomatillosFrost May 10-24
Moon May 10-23
Frost Jul 5-19
Moon Jul 5-19
N/AJun 19
TomatoesFrost Apr 26-May 10
Moon May 7-10
Frost Jul 5-12
Moon Jul 5-12
N/AJun 5
TurnipsN/AN/AFrost May 24-31
Moon May 24-31
Aug 7
WatermelonsFrost May 31-Jun 14
Moon Jun 6-14
Frost Jul 5-12
Moon Jul 5-12
Frost Jun 28-Jul 5
Moon Jul 5
Jun 5
Winter SquashFrost May 31-Jun 7
Moon Jun 6-7
Frost Jun 28-Jul 12
Moon Jul 5-12
Frost Jul 5-12
Moon Jul 5-12
May 15
Zucchini (Summer Squash)Frost May 31-Jun 7
Moon Jun 6-7
Frost Jun 28-Jul 12
Moon Jul 5-12
Frost Jul 5-12
Moon Jul 5-12
Jul 3

Planting Dates for Fall

On average, your first fall frost occurs on September 4 (at TWIN LAKES RSVR, CO climate station).
CropFrost Based on Frost Dates
Moon Based on Moon Dates
Start Seeds OutdoorsTransplantAverage Days to MaturityFrost Tolerance
ArugulaFrost Jul 17-Aug 21
Moon Jul 17-21, Aug 4-19
N/A40Frost-hardy
BeetsFrost Jun 12-Jul 10
Moon Jun 22-Jul 4
N/A50Frost-tolerant
Bok ChoyFrost Jun 26-Jul 17
Moon Jul 5-17
N/A50Frost-tolerant
BroccoliFrost Jun 5-12
Moon Jun 6-12
Frost Jun 26-Jul 10
Moon Jul 5-10
60Frost-tolerant
Brussels SproutsFrost May 15-29
Moon May 15-23
N/A100Frost-hardy
CabbageFrost Jun 5-12
Moon Jun 6-12
Frost Jun 26-Jul 3
90Frost-tolerant
CarrotsFrost Jun 19-26
Moon Jun 22-26
N/A70Frost-tolerant
CauliflowerFrost May 29-Jun 5
Frost Jun 12-19
Moon Jun 12-19
75Frost-tolerant
ChivesFrost Jun 12-Jul 10
Moon Jun 12-21, Jul 5-10
N/A70Frost-tolerant
FennelFrost Jun 5-19
Moon Jun 6-19
N/A80Tender
GarlicFrost Sep 18-Oct 2
Moon Sep 18-Oct 1
N/A120Frost-hardy
Green BeansFrost Jun 19-Jul 3
Moon Jun 19-21
N/A55Tender
KaleFrost Jun 26-Jul 10
Moon Jul 5-10
N/A60Frost-hardy
KohlrabiFrost Jul 3-24
Moon Jul 5-21
N/A45Frost-tolerant
LettuceFrost Jun 26-Jul 10
Moon Jul 5-10
N/A60Frost-tolerant
Mustard GreensFrost Jul 3-24
Moon Jul 5-21
N/A45Tender
PeasFrost Jun 26-Jul 10
Moon Jul 5-10
N/A55Tender
RadishesFrost Jul 24-Aug 7
Moon Jul 24-Aug 3
N/A25Frost-tolerant
SpinachFrost Jul 17-Aug 7
Moon Jul 17-21, Aug 4-7
N/A30Frost-hardy
Swiss ChardFrost Jun 26-Jul 10
Moon Jul 5-10
N/A60Frost-tolerant
TurnipsFrost Jul 3-17
Moon Jul 3-4
N/A50Frost-tolerant
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