Planting Calendar for Walkerton, ON

For the Almanac's fall and spring planting calendars, we've calculated the best time to start seeds indoors, when to transplant young plants outside, and when to direct seed into the ground.

Planting Dates for Fall

On average, your first fall frost occurs on September 22 (at HANOVER, ON climate station).
Crop Based on Frost Dates
Start Seeds Indoors by...Plant Seedlings Outdoors by...Start Seeds Outdoors by...
BeetsN/AN/A Aug 8
Bell Peppers Apr 9 June 17N/A
Broccoli Jun 11 Jul 9N/A
Brussels Sprouts Jun 1 Jun 29N/A
Cabbage Jun 1 Jun 29N/A
CantaloupesN/AN/A June 24
CarrotsN/AN/A Aug 3
Cauliflower Jun 11 Jul 9N/A
Celery Mar 31 June 17N/A
CornN/AN/A Jun 14
CucumbersN/AN/A June 24
Eggplants Apr 9 June 24N/A
Green BeansN/AN/A June 24
Kale Jul 1 Jul 29N/A
LettuceN/AN/A Aug 13
OkraN/AN/A June 24
ParsnipsN/AN/A Jun 19
PeasN/AN/A Jul 19
PotatoesN/AN/A Jul 9
PumpkinsN/AN/A June 24
RadishesN/AN/A Aug 18
SpinachN/AN/A Aug 28
Summer Squash (Zucchini)N/AN/A Jun 24
Swiss ChardN/AN/A Aug 13
Tomatoes Apr 14 June 24N/A
TurnipsN/AN/A Aug 13
WatermelonsN/AN/A June 24

Planting Dates for Spring

On average, your last spring frost occurs on May 27 (at HANOVER, ON climate station).
Crop Based on Frost Dates   Based on Moon Dates
Start Seeds IndoorsPlant Seedlings
or Transplants
Start Seeds Outdoors
Basil Apr 1-15
Apr 1- 7
May 27-Jun 17
May 27-Jun 5
N/A
BeetsN/AN/A May 13-Jun 3
May 13-21
Bell Peppers Mar 18-Apr 1
Mar 24-Apr 1
Jun 3-17
Jun 3- 5
N/A
Broccoli Apr 1-15
Apr 1- 7
Apr 29-May 20
Apr 29-May 7
N/A
Brussels Sprouts Apr 1-15
Apr 1- 7
Apr 29-May 13
Apr 29-May 7
N/A
Cabbage Apr 1-15
Apr 1- 7
Apr 29-May 13
Apr 29-May 7
N/A
Cantaloupes Apr 29-May 6
Apr 29-May 6
Jun 10-24
Jun 21-24
N/A
CarrotsN/AN/A Apr 22-May 6
Cauliflower Apr 1-15
Apr 1- 7
Apr 29-May 20
Apr 29-May 7
N/A
Celery Mar 18-Apr 1
Mar 24-Apr 1
Jun 3-17
Jun 3- 5
N/A
ChivesN/AN/A Apr 29-May 6
Apr 29-May 6
Cilantro (Coriander)N/AN/A May 27-Jun 10
May 27-Jun 5
CornN/AN/A May 27-Jun 10
May 27-Jun 5
Cucumbers Apr 29-May 6
Apr 29-May 6
Jun 10-24
Jun 21-24
N/A
DillN/AN/A Apr 22-May 6
Apr 22-May 6
Eggplants Mar 18-Apr 1
Mar 24-Apr 1
Jun 10-24
Jun 21-24
N/A
Green BeansN/AN/A Jun 3-24
Jun 3- 5, Jun 21-24
Kale Apr 1-15
Apr 1- 7
Apr 29-May 20
Apr 29-May 7
N/A
Lettuce Apr 15-29
Apr 22-29
May 13-Jun 10
May 22-Jun 5
N/A
OkraN/AN/A Jun 10-24
Jun 21-24
OnionsN/AN/A Apr 29-May 20
May 8-20
Oregano Mar 18-Apr 15
Mar 24-Apr 7
May 27-Jun 17
May 27-Jun 5
N/A
ParsleyN/AN/A Apr 29-May 13
Apr 29-May 7
ParsnipsN/AN/A May 6-27
May 8-21
PeasN/AN/A Apr 15-May 6
Apr 22-May 6
PotatoesN/AN/A May 20-Jun 10
May 20-21, Jun 6-10
Pumpkins May 6-20
May 6- 7
Jun 10-24
Jun 21-24
N/A
RadishesN/AN/A Apr 1-22
Apr 8-21
Rosemary Mar 18-Apr 1
Mar 24-Apr 1
Jun 3-24
Jun 3- 5, Jun 21-24
N/A
Sage Apr 1-15
Apr 1- 7
May 27-Jun 10
May 27-Jun 5
N/A
SpinachN/AN/A Apr 15-May 6
Apr 22-May 6
Summer Squash (Zucchini) Apr 29-May 13
Apr 29-May 7
Jun 10-24
Jun 21-24
N/A
Sweet Potatoes Apr 29-May 6
Jun 10-24
Jun 10-20
N/A
Swiss Chard Apr 15-29
Apr 22-29
May 6-13
May 6- 7
N/A
Thyme Mar 18-Apr 15
Mar 24-Apr 7
May 27-Jun 17
May 27-Jun 5
N/A
Tomatoes Apr 1-15
Apr 1- 7
Jun 3-24
Jun 3- 5, Jun 21-24
N/A
TurnipsN/AN/A Apr 29-May 20
May 8-20
Watermelons Apr 29-May 6
Apr 29-May 6
Jun 10-24
Jun 21-24
N/A

How to Use the Planting Calendar

This planting calendar is a guide that tells you the best time to start planting your garden, based on frost dates. Our planting calendar is customized to your location in order to give you the most accurate information possible. 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. Although frost dates are a good way to know approximately when to start gardening, always check a local forecast before planting outdoors!
  • The Plant Seedlings or Transplants dates indicate the best time to plant young plants outdoors. This includes plants grown from seed indoors at home and small starter plants bought from a nursery.
  • When no dates ("N/A") appear in the chart, that starting method is typically not recommended for that particular plant, although it likely still possible. See each plant's individual Growing Guide for more specific information. 
  • 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. We use Moon-favorable dates at the very start of the gardening season. It's a little complex for a fall planting.

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!

Frequently Asked Questions

Why Do You Start Seeds Indoors?

In the spring, starting seeds indoors (in seed trays or starter pots) gives your crops a head start on the growing season, which is especially important in regions with a short growing season. Starting seeds indoors also provides plants with a chance to grow in a stable, controlled environment. Outdoors, the unpredictability of rain, drought, frost, low and high temperatures, sunlight, and pests and diseases can take a toll on young plants, especially when they're just getting started. Indoors, you can control these elements to maximize your plants' early growth and give them the best shot at thriving when they are eventually transplanted outdoors. 

For most crops, you should start seeds indoors about 6-8 weeks before your last spring frost date. This gives the plants plenty of time to grow large and healthy enough to survive their eventual transplanting to the garden.

Read more about starting seeds indoors here

How Is Planting for a Fall Harvest Different? 

Planting in late summer for a fall harvest has many benefits (soil is already warm, temperatures are cooler, fewer pests). However, the challenge is getting your crops harvested before the winter frosts begin. When we calculate fall planting dates (which are really in the summer), we must account for several factors, such as the time to harvest once the crop is mature and whether a crop is tender or hardy when it comes to frost. The "days to maturity" of a crop and the length of your growing season also factor into whether you start seeds early indoors or directly sow seeds into the ground outside. Note:

  • Warm-weather veggies like beans, corn, squashes, pumpkins, cucumbers, cantaloupe, and watermelons are all sown directly into the ground.
  • Tender heat-loving plants such as tomatoes, peppers, and eggplants take a long time to mature and have a lengthy harvesting period, so we generally don't plant a second round of these crops for fall, as they won't ripen in time. (In regions with mild winters, this may not be the case.) These crops are typically started indoors early in the season and transplanted.
  • Root vegetables (beets, carrots) do not transplant well, so start seeds directly in the soil outside.
  • Peas are also best seeded into the ground; do not transplant.
  • Cole crops like broccoli, cauliflower, kale, and cabbage could be direct seeded, but because of the heat of mid- and late summer, it's better to start them indoors and then transplant them into the garden.
  • We tend to direct-sow leafy greens such as lettuce, chard, and spinach, though some gardeners will also sow indoors. It depends on your climate.
  • Note that garlic is not included in our planting chart. It's a popular fall crop, but the dates vary wildly based on location and it's really best to gauge garlic planting dates with a soil thermometer. When the soil temperature is 60°F (15.6°C) at a depth of 4 inches, then plant your garlic. We'd advise checking our Garlic Growing Guide for more information. 

Read more about the "Best Vegetables to Plant in the Fall."

When Should You Transplant Seedlings?

When seedlings have grown too large for their seed trays or starter pots, it's time to transplant. If it's not yet warm enough to plant outdoors, transplant the seedlings to larger plastic or peat pots indoors and continue care. If outdoor conditions allow, start hardening off your seedlings approximately one week before your last frost date, then transplant them into the garden. Get more tips for transplanting seedlings.

What Is Planting by the Moon?

Planting by the Moon (also called "Gardening by the Moon") is a traditional way to plant your above- and below-ground crops, especially at the start of the season. Here's how it works:

  • Plant annual flowers and vegetables that bear crops above ground during the light, or waxing, of the Moon. In other words, plant from the day the Moon is new until the day it is full.
  • Plant flowering bulbs, biennial and perennial flowers, and vegetables that bear crops below ground during the dark, or waning, of the Moon. In other words, plant from the day after the Moon is full until the day before it is new again.

Old-time farmers swear that this practice results in a larger, tastier harvest, so we've included planting by the Moon dates in our planting calendar, too. Learn more about Planting and Gardening by the Moon.