Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You will be able to figure out when it's a good idea to plant anchusa by referring to the USDA zone info for Rogers.

Planting Calendar for Anchusa

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

Since anchusa do well in cold you can plant them a lot earlier in the year than other frost tender plants.

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

The last month that you can plant anchusa and expect a good harvest is probably August. Any later than that and your anchusa may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your anchusa indoors.

Last Frost Date

The average date of last frost is May 15 in Rogers. It might get as low as -25°F during the coldest months of winter.

It's important to remember that USDA zone info for Rogers is an average and the actual date of last frost will vary from year to year. Half of the time in Rogers you get a frost after May 15 so always be ready to cover your anchusa if you have a late frost.

USDA Zone Info for Rogers

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Rogers

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