My Planting Calendar

Montana planting calendar

Using Montana’s average last spring frost of May 15 and first fall frost of September 15 — about 123 frost-free days. USDA zones 3a, 3b, 4a, 4b, 5a, 5b, 6a.

Montana 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 20 – Mar 6May 8 – May 25—Aug 23 – Sep 12
OnionFeb 27 – Mar 13Apr 17 – May 4—Jul 23 – Aug 22
LeekFeb 27 – Mar 13Apr 24 – May 11—Aug 9 – Sep 28
CeleryFeb 27 – Mar 13May 8 – May 25—Aug 23 – Oct 2
RosemaryFeb 27 – Mar 13May 15 – Jun 1—Aug 20 – Sep 19
EggplantMar 6 – Mar 20May 29 – Jun 15—Aug 9 – Aug 29
ParsleyMar 6 – Mar 20Apr 24 – May 11Jun 27 – Jul 14Jul 10 – Jul 30
ShallotMar 6 – Mar 20Apr 17 – May 4Sep 19 – Oct 6Jul 23 – Aug 22
Bell PepperMar 13 – Mar 27May 22 – Jun 8—Jul 28 – Aug 27
Chili PepperMar 13 – Mar 27May 22 – Jun 8—Aug 7 – Sep 6
Green Onion / ScallionMar 13 – Mar 27Apr 10 – Apr 27Jul 11 – Jul 28Jun 16 – Jul 6
ThymeMar 13 – Mar 27May 8 – May 25—Jul 29 – Aug 13
OreganoMar 13 – Mar 27May 8 – May 25—Aug 3 – Aug 13
MintMar 13 – Mar 27May 1 – May 18—Jul 17 – Aug 6
SageMar 13 – Mar 27May 8 – May 25—Jul 29 – Aug 13
TarragonMar 13 – Mar 27May 1 – May 18—Jul 7 – Aug 6
GingerMar 13 – Mar 27May 29 – Jun 15—Jan 31 – Apr 1
TurmericMar 13 – Mar 27May 29 – Jun 15—Jan 31 – Apr 1
TomatoMar 20 – Apr 3May 15 – Jun 1—Jul 21 – Aug 15
TomatilloMar 20 – Apr 3May 15 – Jun 1—Aug 5 – Aug 30
Ground CherryMar 20 – Apr 3May 15 – Jun 1—Jul 31 – Aug 20
Sweet MarjoramMar 20 – Apr 3May 15 – Jun 1—Jul 21 – Aug 10
Lemon BalmMar 20 – Apr 3May 1 – May 18—Jul 17 – Aug 6
Shiso (Perilla)Mar 20 – Apr 3May 15 – Jun 1—Jul 31 – Aug 20
KaleMar 27 – Apr 10Apr 17 – May 4Jun 20 – Jul 7Jun 13 – Jun 28
BroccoliMar 27 – Apr 10Apr 24 – May 11Jun 6 – Jun 23Jun 30 – Jul 25
CauliflowerMar 27 – Apr 10Apr 24 – May 11Jun 6 – Jun 23Jun 30 – Jul 30
CabbageMar 27 – Apr 10Apr 17 – May 4Jun 6 – Jun 23Jun 23 – Aug 2
Brussels SproutsMar 27 – Apr 10Apr 24 – May 11May 16 – Jun 2Jul 30 – Aug 29
OkraApr 3 – Apr 17May 22 – Jun 8—Jul 18 – Aug 2
BasilApr 3 – Apr 17May 22 – Jun 8—Jun 28 – Jul 28
Collard GreensApr 3 – Apr 17Apr 17 – May 4Jun 27 – Jul 14Jun 18 – Jul 8
KohlrabiApr 3 – Apr 17Apr 17 – May 4Jul 11 – Jul 28Jun 8 – Jun 23
Endive & EscaroleApr 3 – Apr 17Apr 24 – May 11Jun 27 – Jul 14Jul 25 – Aug 9
RadicchioApr 3 – Apr 17Apr 24 – May 11Jun 20 – Jul 7Jun 30 – Aug 9
ChayoteApr 3 – Apr 17May 22 – Jun 8—Sep 26 – Oct 26
Malabar SpinachApr 3 – Apr 17May 22 – Jun 8—Jul 23 – Aug 7
Summer SavoryApr 3 – Apr 17May 15 – Jun 1—Jul 16 – Jul 31
Pea—Apr 5 – Apr 24Jun 27 – Jul 14Jun 4 – Jun 19
Spinach—Apr 5 – Apr 24Jul 18 – Aug 4May 17 – May 25
Mache (Corn Salad)—Apr 5 – Apr 24Jul 11 – Jul 28May 25 – Jun 9
LettuceApr 10 – Apr 24Apr 24 – May 11Jul 11 – Jul 28May 31 – Jun 30
Swiss ChardApr 10 – Apr 24Apr 24 – May 11Jun 27 – Jul 14Jun 20 – Jun 30
Bok Choy / Pak ChoiApr 10 – Apr 24Apr 24 – May 11Jul 11 – Jul 28Jun 5 – Jun 20
Fennel (Bulb)Apr 10 – Apr 24May 1 – May 18Jun 13 – Jun 30Jul 12 – Aug 6
Napa CabbageApr 10 – Apr 24Apr 24 – May 11Jun 27 – Jul 14Jun 20 – Jul 15
Bitter MelonApr 10 – Apr 24May 22 – Jun 8—Jul 23 – Aug 12
CucamelonApr 10 – Apr 24May 22 – Jun 8—Aug 2 – Aug 12
New Zealand SpinachApr 10 – Apr 24May 15 – Jun 1—Jul 11 – Jul 31
PeanutApr 10 – Apr 24May 15 – Jun 1—Aug 30 – Oct 19
WatercressApr 10 – Apr 24Apr 24 – May 11Jul 25 – Aug 11Jun 20 – Jun 30
Luffa (Loofah Gourd)Apr 10 – Apr 24May 22 – Jun 8—Aug 27 – Oct 26
Beet—Apr 12 – May 1Jul 4 – Jul 21Jun 6 – Jun 26
Radish—Apr 12 – May 1Aug 1 – Aug 18May 9 – May 17
Arugula—Apr 12 – May 1Jul 25 – Aug 11May 17 – May 27
Fava Bean (Broad Bean)—Apr 12 – May 1Jul 11 – Jul 28Jul 1 – Jul 16
Tatsoi—Apr 12 – May 1Jul 18 – Aug 4May 22 – Jun 6
Mizuna—Apr 12 – May 1Jul 11 – Jul 28May 22 – Jun 1
CucumberApr 17 – May 1May 22 – Jun 8Jun 13 – Jun 30Jul 18 – Aug 7
Zucchini / Summer SquashApr 17 – May 1May 15 – Jun 1Jun 13 – Jun 30Jul 6 – Jul 21
Winter SquashApr 17 – May 1May 15 – Jun 1—Aug 10 – Sep 9
PumpkinApr 17 – May 1May 15 – Jun 1—Aug 20 – Sep 19
Cantaloupe / MuskmelonApr 17 – May 1May 22 – Jun 8—Aug 7 – Aug 27
WatermelonApr 17 – May 1May 22 – Jun 8—Aug 7 – Sep 6
Rhubarb—Apr 17 – May 4——
Horseradish—Apr 17 – May 4——
SunflowerApr 17 – May 1May 15 – Jun 1—Jul 31 – Aug 30
Carrot—Apr 19 – May 8Jun 20 – Jul 7Jun 23 – Jul 13
Turnip—Apr 19 – May 8Jul 18 – Aug 4Jun 3 – Jun 23
Mustard Greens—Apr 19 – May 8Jul 18 – Aug 4May 24 – Jun 8
Rapini (Broccoli Raab)—Apr 19 – May 8Jul 11 – Jul 28Jun 3 – Jun 23
Chervil—Apr 19 – May 8Jul 18 – Aug 4Jun 3 – Jun 23
Chives—Apr 24 – May 11——
Asparagus—Apr 24 – May 11——
Sorrel—Apr 24 – May 11——
Potato—Apr 26 – May 15—Jul 10 – Aug 29
Cilantro / Coriander—Apr 26 – May 15Jul 4 – Jul 21Jun 15 – Jul 10
Salsify—Apr 26 – May 15—Aug 19 – Sep 28
Borage—Apr 26 – May 15Jul 11 – Jul 28Jun 25 – Jul 15
Globe Artichoke—May 1 – May 18——
Parsnip—May 3 – May 22—Aug 16 – Sep 15
Dill—May 10 – May 29Jul 11 – Jul 28Jun 24 – Jul 14
Bush Bean—May 17 – Jun 5Jun 20 – Jul 7Jul 11 – Jul 21
Pole Bean—May 17 – Jun 5—Jul 21 – Jul 31
Sweet Corn—May 17 – Jun 5—Jul 21 – Aug 30
Edamame (Soybean)—May 17 – Jun 5—Aug 5 – Aug 30
Amaranth (Leaf)—May 17 – Jun 5—Jun 21 – Jul 11
Lima Bean—May 24 – Jun 12—Aug 2 – Sep 1
Southern Pea (Cowpea)—May 24 – Jun 12—Jul 28 – Aug 27
Sweet Potato—May 29 – Jun 15—Sep 3 – Oct 3
Rutabaga——May 30 – Jun 16—
Garlic——Sep 26 – Oct 13—

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.