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

It's a good idea to estimate when you can plant violas by checking out the USDA zone info for Maryland Heights.

Planting Calendar for Violas

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

Since violas are very cold tolerant you can plant them earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant violas in Maryland Heights 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 really do well. If you are starting your violas indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Maryland Heights. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Maryland Heights is just an average the actual date of last frost will vary from year to year. Half of the time in Maryland Heights there is a last frost after April 15 so be sure to be ready to protect your violas in the event of one of those late frosts.

USDA Zone Info for Maryland Heights

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Maryland Heights

You may be interested in your other planting guides for Maryland Heights.