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.

The first opportunity to plant anchusa in Richfield can be determined by looking at 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.

Since anchusa are very cold tolerant you can plant them quite a bit earlier in the year than other frost tender plants.

The earliest that you can plant anchusa in Richfield 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. If you wait 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 when the weather gets warmer is on April 15 in Richfield. You can expect an average low temperature of -10°F in the coldest months of winter.

Always keep in mind that USDA zone info for Richfield is an average and the actual date of last frost will vary from year to year. Since half of the time in Richfield you get surprised by a frost after April 15 be ready to protect your anchusa if you have a late frost.

USDA Zone Info for Richfield

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 Richfield

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