Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The earliest that you can plant myosotis in Ontario should be determined by looking at the USDA zone info.

Planting Calendar for Myosotis

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

You can plant myosotis a little earlier in the year because they are moderately cold tolerant.

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

The last month that you can plant myosotis and expect a good harvest is probably October. You probably don't want to wait any later than that or else your myosotis may not have a chance to grow to maturity. You can get started a little bit earlier by starting your myosotis indoors.

Last Frost Date

The average date of last frost is January 31 in Ontario. In the coldest months of winter you can expect an average low temperature of 30°F.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Ontario and it can change quite a bit from year to year. Half of the time in Ontario it frosts late in the year after January 31 so make sure that you are prepared to protect your myosotis if you have a surprise late frost.

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.