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.

By referring to the USDA zone info for Ontario you should be able to figure out when to plant aurinia.

Planting Calendar for Aurinia

Frost tolerance for aurinia:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Aurinia do well in cold which tells us that you can get them planted much earlier than other frost tender plants.

The earliest that you can plant aurinia 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 aurinia and expect a good harvest is probably September. If you wait any later than that and your aurinia may not have a chance to grow to maturity. Starting your aurinia indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in Ontario. You should expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Ontario is not always accurate 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 April 15 be ready to protect your aurinia 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.