One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The first opportunity to plant stocks in Ontario can be estimated by referring to the USDA zone info.

Planting Calendar for Stocks

Frost tolerance for stocks:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since stocks are barely cold tolerant you can plant them slightly earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant stocks in Ontario is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant stocks and expect a good harvest is probably September. Any later than that and your stocks may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your stocks indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in Ontario. It might get as low as 30°F during the coldest months of winter.

It's important to remember that USDA zone info for Ontario is just an average and the actual date of last frost will vary from year to year. Since half of the time in Ontario there is a last frost after January 31 be ready to cover your stocks if you have one of those late frosts.

USDA Zone Info for Ontario

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Ontario

You may be interested in your other planting guides for Ontario.