One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Aspen you can figure out when it's a good idea to plant bee balm by looking at the USDA zone info.

Planting Calendar for Bee Balm

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

You can plant bee balm just a tiny bit earlier in the year because they do ok in moderate cold.

The earliest that you can plant bee balm in Aspen 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 bee balm and expect a good harvest is probably August. If you wait any later than that and your bee balm may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your bee balm indoors.

Last Frost Date

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

Just be sure to remember that USDA zone info for Aspen is not always accurate and the actual date of last frost changes from year to year. Since half of the time in Aspen last frost occurs after April 15 be ready to cover your bee balm if you have a late frost.

USDA Zone Info for Aspen

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 Aspen

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