The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's a good idea to determine when it's a good idea to plant begonias by using the USDA zone info for Union.

Planting Calendar for Begonias

Frost tolerance for begonias:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Begonias require warm weather which means that it's important to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant begonias 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 begonias and expect a good harvest is probably August. You probably don't want to wait any later than that or else your begonias may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your begonias indoors.

Last Frost Date

The average date of last frost is April 15 in Union. You should expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for Union may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in Union there is a last frost after April 15 be ready to cover your begonias in the event of a late frost.

USDA Zone Info for Union

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 Union

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