Planting Calendar for Boise, ID

Find the best dates for planting vegetables and fruit in your garden! Our free planting calendar calculates the best time to start seeds indoors and outdoors, as well as when to plant young plants outside.

How to Use the Planting Calendar

Simply put, a planting calendar is a guide that tells you the best time to start planting your garden. Most planting calendars are based on frost dates, which dictate when you should start seeds and when it's safe to plant outdoors in your area. Our planting calendar is customized to your location in order to give you the most accurate information possible.

On the planting calendar below, please note:

  • The Frost Dates indicate the best planting dates based on your local average frost dates. Average frost dates are based on historical weather data and are the planting guideline used by most gardeners.
  • The Moon Dates indicate the best planting dates based on your local frost dates and Moon phases. Planting by the Moon is considered a more traditional technique.
  • The Transplant Seedlings dates indicate the best time to plant young plants outdoors. This includes plants grown from seed at home and plants bought from a nursery. Although frost dates are a good way to know approximately when to start gardening, always check a local forecast before planting outdoors!
  • When no dates appear in the chart, that starting method is not recommended for that particular plant. Some crops do best when started outdoors rather than indoors, while others prefer the opposite.
  • Click on the name of a plant to see our corresponding Growing Guide.

To plan your garden more accurately in the future, keep a record of your garden's conditions each year, including frost dates and seed-starting dates!

30% probability of frost free after May 7 (at BOISE AIR TERMINAL, ID climate station).
Crop Based on Frost Dates   Based on Moon Dates
Start Seeds IndoorsTransplant SeedlingsStart Seeds Outdoors
Beans May 14-Jun 4
May 14-18, Jun 3- 4
Beets Apr 23-May 14
Apr 23-May 3
Broccoli Mar 26-Apr 9
Apr 5- 9
Apr 16-May 7
Apr 16-19, May 4- 7
Brussels Sprouts Mar 26-Apr 9
Apr 5- 9
Apr 9-30
Apr 9-19
Cabbage Mar 12-26
Mar 12-20
Apr 9-23
Apr 9-19
Cantaloupe Apr 9-16
Apr 9-16
May 21-Jun 11
Jun 3-11
Carrots Apr 2-16
Apr 2- 4
Cauliflower Mar 26-Apr 9
Apr 5- 9
Apr 9-23
Apr 9-19
Celery Feb 25-Mar 12
Mar 6-12
May 14-28
May 14-18
Collards Mar 26-Apr 9
Apr 5- 9
Apr 9-30
Apr 9-19
Corn May 7-21
May 7-18
Cucumbers Apr 9-16
Apr 9-16
May 21-Jun 11
Jun 3-11
Eggplants Feb 25-Mar 12
Mar 6-12
May 21-Jun 11
Jun 3-11
Kale Mar 26-Apr 9
Apr 5- 9
Apr 9-30
Apr 9-19
Kohlrabi Apr 9-30
Apr 9-19
Leeks Feb 25-Mar 12
Mar 6-12
Apr 9-30
Apr 9-19
Lettuce Mar 26-Apr 9
Apr 5- 9
Apr 23-May 21
May 4-18
Okra May 21-Jun 4
Jun 3- 4
Onions Apr 9-30
Apr 20-30
Parsnips Apr 16-May 7
Apr 20-May 3
Peas Mar 26-Apr 16
Apr 5-16
Peppers Feb 25-Mar 12
Mar 6-12
May 21-Jun 11
Jun 3-11
Potatoes Apr 30-May 21
Apr 30-May 3, May 19-21
Pumpkins Apr 9-23
Apr 9-19
May 21-Jun 11
Jun 3-11
Radishes Mar 12-Apr 2
Mar 21-Apr 2
Spinach Mar 26-Apr 16
Apr 5-16
Squash Apr 9-23
Apr 9-19
May 21-Jun 11
Jun 3-11
Sweet Potatoes Apr 9-16
May 21-Jun 11
May 21-Jun 2
Swiss Chard Mar 26-Apr 9
Apr 5- 9
Apr 16-23
Apr 16-19
Tomatoes Mar 12-26
Mar 12-20
May 14-Jun 4
May 14-18, Jun 3- 4
Turnips Apr 9-30
Apr 20-30
Watermelons Apr 9-16
Apr 9-16
May 21-Jun 11
Jun 3-11