One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to determine when you can plant endive by checking out the USDA zone info for Ontario.

Planting Calendar for Endive

Frost tolerance for endive:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since endive are moderately cold tolerant you can plant them a little bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant endive 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 endive and expect a good harvest is probably September. If you wait any later than that and your endive may not have a chance to grow to maturity. You can get started a little bit earlier by starting your endive indoors.

Last Frost Date

The average date of last frost is April 15 in Ontario. You can expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Ontario is just an average the actual date of last frost will vary from year to year. Since half of the time in Ontario last frost occurs after April 15 be ready to protect your endive if you have a late frost.

USDA Zone Info for Ontario

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Ontario

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