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 can determine when it's the best time to plant bachelor buttons in Aspen by using the USDA zone info.

Planting Calendar for Bachelor Buttons

Frost tolerance for bachelor buttons:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since bachelor buttons do well in moderate cold you can plant them just a bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant bachelor buttons in Aspen 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 bachelor buttons and expect a good harvest is probably September. Any later than that and your bachelor buttons may not have a chance to grow to maturity. If you are starting your bachelor buttons indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Aspen. You can 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 may not be accurate from year to year and the actual date of last frost changes from year to year. Since half of the time in Aspen there is a last frost after April 15 be ready to protect your bachelor buttons if you have one of those late frosts.

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.