The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In River Rouge you can figure out when it's a good idea to plant veronica by reviewing the USDA zone info.

Planting Calendar for Veronica

Frost tolerance for veronica:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Veronica do well in moderate cold which tells us that you can plant them a little bit earlier than more sensitive plants.

The earliest that you can plant veronica in River Rouge 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 veronica and expect a good harvest is probably September. You probably don't want to wait any later than that or else your veronica may not have a chance to grow to maturity. Starting your veronica indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in River Rouge. In the coldest months of winter you should expect an average low temperature of -5°F.

Since the USDA zone info for River Rouge is just an average the actual date of last frost changes from year to year. Since half of the time in River Rouge it frosts late in the year after April 15 be ready to cover your veronica in the event of a surprise late frost.

USDA Zone Info for River Rouge

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in River Rouge

You may be interested in your other planting guides for River Rouge.