My Planting Calendar

Colorado planting calendar

Using Colorado’s average last spring frost of May 5 and first fall frost of October 1 — about 149 frost-free days. USDA zones 3b, 4b, 5a, 5b, 6a, 7a.

Colorado covers a very wide range of climates. Treat this as a starting point and adjust to your local frost dates — the calendar generator lets you enter them.

CropStart indoorsTransplant / sow outFall sowingFirst harvest
CeleriacFeb 10 – Feb 24Apr 28 – May 15—Aug 13 – Sep 2
OnionFeb 17 – Mar 3Apr 7 – Apr 24—Jul 13 – Aug 12
LeekFeb 17 – Mar 3Apr 14 – May 1—Jul 30 – Sep 18
CeleryFeb 17 – Mar 3Apr 28 – May 15—Aug 13 – Sep 22
RosemaryFeb 17 – Mar 3May 5 – May 22—Aug 10 – Sep 9
EggplantFeb 24 – Mar 10May 19 – Jun 5—Jul 30 – Aug 19
ParsleyFeb 24 – Mar 10Apr 14 – May 1Jul 13 – Jul 30Jun 30 – Jul 20
ShallotFeb 24 – Mar 10Apr 7 – Apr 24Oct 5 – Oct 22Jul 13 – Aug 12
Bell PepperMar 3 – Mar 17May 12 – May 29—Jul 18 – Aug 17
Chili PepperMar 3 – Mar 17May 12 – May 29—Jul 28 – Aug 27
Green Onion / ScallionMar 3 – Mar 17Mar 31 – Apr 17Jul 27 – Aug 13Jun 6 – Jun 26
ThymeMar 3 – Mar 17Apr 28 – May 15—Jul 19 – Aug 3
OreganoMar 3 – Mar 17Apr 28 – May 15—Jul 24 – Aug 3
MintMar 3 – Mar 17Apr 21 – May 8—Jul 7 – Jul 27
SageMar 3 – Mar 17Apr 28 – May 15—Jul 19 – Aug 3
TarragonMar 3 – Mar 17Apr 21 – May 8—Jun 27 – Jul 27
GingerMar 3 – Mar 17May 19 – Jun 5—Jan 21 – Mar 22
TurmericMar 3 – Mar 17May 19 – Jun 5—Jan 21 – Mar 22
TomatoMar 10 – Mar 24May 5 – May 22—Jul 11 – Aug 5
TomatilloMar 10 – Mar 24May 5 – May 22—Jul 26 – Aug 20
Ground CherryMar 10 – Mar 24May 5 – May 22—Jul 21 – Aug 10
Sweet MarjoramMar 10 – Mar 24May 5 – May 22—Jul 11 – Jul 31
Lemon BalmMar 10 – Mar 24Apr 21 – May 8—Jul 7 – Jul 27
Shiso (Perilla)Mar 10 – Mar 24May 5 – May 22—Jul 21 – Aug 10
KaleMar 17 – Mar 31Apr 7 – Apr 24Jul 6 – Jul 23Jun 3 – Jun 18
BroccoliMar 17 – Mar 31Apr 14 – May 1Jun 22 – Jul 9Jun 20 – Jul 15
CauliflowerMar 17 – Mar 31Apr 14 – May 1Jun 22 – Jul 9Jun 20 – Jul 20
CabbageMar 17 – Mar 31Apr 7 – Apr 24Jun 22 – Jul 9Jun 13 – Jul 23
Brussels SproutsMar 17 – Mar 31Apr 14 – May 1Jun 1 – Jun 18Jul 20 – Aug 19
OkraMar 24 – Apr 7May 12 – May 29—Jul 8 – Jul 23
BasilMar 24 – Apr 7May 12 – May 29—Jun 18 – Jul 18
Collard GreensMar 24 – Apr 7Apr 7 – Apr 24Jul 13 – Jul 30Jun 8 – Jun 28
KohlrabiMar 24 – Apr 7Apr 7 – Apr 24Jul 27 – Aug 13May 29 – Jun 13
Endive & EscaroleMar 24 – Apr 7Apr 14 – May 1Jul 13 – Jul 30Jul 15 – Jul 30
RadicchioMar 24 – Apr 7Apr 14 – May 1Jul 6 – Jul 23Jun 20 – Jul 30
ChayoteMar 24 – Apr 7May 12 – May 29—Sep 16 – Oct 16
Malabar SpinachMar 24 – Apr 7May 12 – May 29—Jul 13 – Jul 28
Summer SavoryMar 24 – Apr 7May 5 – May 22—Jul 6 – Jul 21
Pea—Mar 26 – Apr 14Jul 13 – Jul 30May 25 – Jun 9
Spinach—Mar 26 – Apr 14Aug 3 – Aug 20May 7 – May 15
Mache (Corn Salad)—Mar 26 – Apr 14Jul 27 – Aug 13May 15 – May 30
LettuceMar 31 – Apr 14Apr 14 – May 1Jul 27 – Aug 13May 21 – Jun 20
Swiss ChardMar 31 – Apr 14Apr 14 – May 1Jul 13 – Jul 30Jun 10 – Jun 20
Bok Choy / Pak ChoiMar 31 – Apr 14Apr 14 – May 1Jul 27 – Aug 13May 26 – Jun 10
Fennel (Bulb)Mar 31 – Apr 14Apr 21 – May 8Jun 29 – Jul 16Jul 2 – Jul 27
Napa CabbageMar 31 – Apr 14Apr 14 – May 1Jul 13 – Jul 30Jun 10 – Jul 5
Bitter MelonMar 31 – Apr 14May 12 – May 29—Jul 13 – Aug 2
CucamelonMar 31 – Apr 14May 12 – May 29—Jul 23 – Aug 2
New Zealand SpinachMar 31 – Apr 14May 5 – May 22—Jul 1 – Jul 21
PeanutMar 31 – Apr 14May 5 – May 22—Aug 20 – Oct 9
WatercressMar 31 – Apr 14Apr 14 – May 1Aug 10 – Aug 27Jun 10 – Jun 20
Luffa (Loofah Gourd)Mar 31 – Apr 14May 12 – May 29—Aug 17 – Oct 16
Beet—Apr 2 – Apr 21Jul 20 – Aug 6May 27 – Jun 16
Radish—Apr 2 – Apr 21Aug 17 – Sep 3Apr 29 – May 7
Arugula—Apr 2 – Apr 21Aug 10 – Aug 27May 7 – May 17
Fava Bean (Broad Bean)—Apr 2 – Apr 21Jul 27 – Aug 13Jun 21 – Jul 6
Tatsoi—Apr 2 – Apr 21Aug 3 – Aug 20May 12 – May 27
Mizuna—Apr 2 – Apr 21Jul 27 – Aug 13May 12 – May 22
CucumberApr 7 – Apr 21May 12 – May 29Jun 29 – Jul 16Jul 8 – Jul 28
Zucchini / Summer SquashApr 7 – Apr 21May 5 – May 22Jun 29 – Jul 16Jun 26 – Jul 11
Winter SquashApr 7 – Apr 21May 5 – May 22—Jul 31 – Aug 30
PumpkinApr 7 – Apr 21May 5 – May 22—Aug 10 – Sep 9
Cantaloupe / MuskmelonApr 7 – Apr 21May 12 – May 29—Jul 28 – Aug 17
WatermelonApr 7 – Apr 21May 12 – May 29—Jul 28 – Aug 27
Rhubarb—Apr 7 – Apr 24——
Horseradish—Apr 7 – Apr 24——
SunflowerApr 7 – Apr 21May 5 – May 22—Jul 21 – Aug 20
Carrot—Apr 9 – Apr 28Jul 6 – Jul 23Jun 13 – Jul 3
Turnip—Apr 9 – Apr 28Aug 3 – Aug 20May 24 – Jun 13
Mustard Greens—Apr 9 – Apr 28Aug 3 – Aug 20May 14 – May 29
Rapini (Broccoli Raab)—Apr 9 – Apr 28Jul 27 – Aug 13May 24 – Jun 13
Chervil—Apr 9 – Apr 28Aug 3 – Aug 20May 24 – Jun 13
Chives—Apr 14 – May 1——
Asparagus—Apr 14 – May 1——
Sorrel—Apr 14 – May 1——
Potato—Apr 16 – May 5—Jun 30 – Aug 19
Cilantro / Coriander—Apr 16 – May 5Jul 20 – Aug 6Jun 5 – Jun 30
Salsify—Apr 16 – May 5—Aug 9 – Sep 18
Borage—Apr 16 – May 5Jul 27 – Aug 13Jun 15 – Jul 5
Globe Artichoke—Apr 21 – May 8——
Parsnip—Apr 23 – May 12—Aug 6 – Sep 5
Dill—Apr 30 – May 19Jul 27 – Aug 13Jun 14 – Jul 4
Bush Bean—May 7 – May 26Jul 6 – Jul 23Jul 1 – Jul 11
Pole Bean—May 7 – May 26—Jul 11 – Jul 21
Sweet Corn—May 7 – May 26—Jul 11 – Aug 20
Edamame (Soybean)—May 7 – May 26—Jul 26 – Aug 20
Amaranth (Leaf)—May 7 – May 26—Jun 11 – Jul 1
Lima Bean—May 14 – Jun 2—Jul 23 – Aug 22
Southern Pea (Cowpea)—May 14 – Jun 2—Jul 18 – Aug 17
Sweet Potato—May 19 – Jun 5—Aug 24 – Sep 23
Rutabaga——Jun 15 – Jul 2—
Garlic——Oct 12 – Oct 29—

Windows are ~1–2 week bands around each date. Frost dates are a statewide average from NOAA/NCEI normals; your town may differ by two weeks or more. Calendar year 2026.