Before planting it is a good idea to find your USDA Zone info to estimate 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.

One way of determining when it's the best time to plant bells of ireland is to use the USDA zone info for Wyoming.

Planting Calendar for Bells of Ireland

Frost tolerance for bells of ireland:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Bells of Ireland do ok in a tiny bit of cold which means that you can plant them just a tiny bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant bells of ireland in Wyoming 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 bells of ireland and expect a good harvest is probably August. Any later than that and your bells of ireland may not have a chance to really do well. You can get started a couple of weeks earlier by starting your bells of ireland indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Wyoming. You should expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Wyoming is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Wyoming there is a last frost after April 15 be ready to cover your bells of ireland if you have a surprise late frost.

USDA Zone Info for Wyoming

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 Wyoming

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