One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. 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 estimate when to plant anchusa by checking out the USDA zone info for Lewistown.

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 earlier in the year because they do well in cold.

The earliest that you can plant anchusa in Lewistown 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. You probably don't want to wait any later than that or else your anchusa may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your anchusa indoors.

Last Frost Date

On average the last frost is on May 15 in Lewistown. In the coldest months of winter you can expect an average low temperature of -30°F.

Keep in mind that USDA zone info for Lewistown is not always accurate and the actual date of last frost is different every year. Since half of the time in Lewistown last frost occurs after May 15 be ready to cover your anchusa if you have a surprise late frost.

USDA Zone Info for Lewistown

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Lewistown

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