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.

One way of determining when it's the best time to plant bishop's weed is to use the USDA zone info for Cedar Rapids.

Planting Calendar for Bishop's Weed

Frost tolerance for bishop's weed:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Bishop's Weed are one of those plants that can tolerate quite a bit of cold weather which tells us that you can start planting them much earlier than other plants that might not handle the cold.

The earliest that you can plant bishop's weed in Cedar Rapids 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 bishop's weed and expect a good harvest is probably September. Any later than that and your bishop's weed may not have a chance to really do well. You can get started a few weeks earlier by starting your bishop's weed indoors.

Last Frost Date

The average date of last frost is April 15 in Cedar Rapids. In the coldest months of winter you can expect an average low temperature of -20°F.

Just be sure to remember that USDA zone info for Cedar Rapids is not always accurate and the actual date of last frost changes from year to year. Half of the time in Cedar Rapids there is a last frost after April 15 so make sure that you are ready to cover your bishop's weed if you have a surprise late frost.

USDA Zone Info for Cedar Rapids

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Cedar Rapids

You may be interested in your other planting guides for Cedar Rapids.