The USDA Zone info is a great tool for gardeners to help us determine 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.

In Union you can estimate when you can plant anchusa by reviewing the USDA zone info.

Planting Calendar for Anchusa

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

You can plant anchusa a lot earlier in the year because they do well in cold.

The earliest that you can plant anchusa in Union 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 anchusa and expect a good harvest is probably September. Any later than that and your anchusa may not have a chance to really do well. You can get started a little bit earlier by starting your anchusa indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Union. In the coldest months of winter you can expect an average low temperature of -10°F.

Since the USDA zone info for Union is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Union last frost occurs after April 15 so make sure that you are prepared to protect your anchusa if you have one of those late frosts.

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.