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.

A way of determining when to plant hardy asters is to look at the USDA zone info for Midlothian.

Planting Calendar for Hardy Asters

Frost tolerance for hardy asters:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Hardy Asters do ok in very little cold which tells us that you can plant them just a tiny bit earlier in the year than more sensitive plants.

The earliest that you can plant hardy asters in Midlothian is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant hardy asters and expect a good harvest is probably August. Any later than that and your hardy asters may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your hardy asters indoors.

Last Frost Date

On average the last frost is on March 15 in Midlothian. You can expect an average low temperature of 10°F in the coldest months of winter.

Keep in mind that USDA zone info for Midlothian may not be accurate from year to year and the actual date of last frost changes from year to year. Half of the time in Midlothian you get a frost after March 15 so always be ready to protect your hardy asters in the event of a surprise late frost.

USDA Zone Info for Midlothian

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Midlothian

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