Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to determine when to plant anchusa by checking out the USDA zone info for Muscatine.

Planting Calendar for Anchusa

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

Anchusa are very cold tolerant which tells us that you can plant them a quite a bit earlier than other frost tender plants.

The earliest that you can plant anchusa in Muscatine 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 fully mature. Starting your anchusa indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost is on April 15 in Muscatine. You can expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Muscatine may not be accurate from year to year the actual date of last frost is different every year. Half of the time in Muscatine there is a last frost after April 15 so be sure to be ready to cover your anchusa if you have a surprise late frost.

USDA Zone Info for Muscatine

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Muscatine

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