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.

A way of figuring out when it's a good idea to plant pentas is to check out the USDA zone info for Union.

Planting Calendar for Pentas

Frost tolerance for pentas:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably not a good idea to plant pentas until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant pentas in Union is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant pentas and expect a good harvest is probably August. You probably don't want to wait any later than that or else your pentas may not have a chance to really do well. You can get started a few weeks earlier by starting your pentas indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on March 15 in Union. You should expect an average low temperature of 10°F in the coldest months of winter.

Keep in mind that USDA zone info for Union is not always accurate and the actual date of last frost changes from year to year. Half of the time in Union it frosts late in the year after March 15 so make sure that you are prepared to cover your pentas in the event of a late frost.

USDA Zone Info for Union

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 Union

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