One of the best tools that you have as gardeners to help us estimate 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.

A common way of making a decision about when it's a good idea to plant violas is to consult the USDA zone info for Addison.

Planting Calendar for Violas

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

You can plant violas a lot earlier in the year because they are one of those plants that can tolerate quite a bit of cold weather.

The earliest that you can plant violas in Addison 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 violas and expect a good harvest is probably September. Any later than that and your violas may not have a chance to fully mature. If you are starting your violas indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Addison the average date of last frost happens on April 15. You can expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Addison is an average the actual date of last frost changes from year to year. Since half of the time in Addison last frost occurs after April 15 be ready to cover your violas if you have a surprise late frost.

USDA Zone Info for Addison

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Addison

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