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

The earliest that you can plant decorative kale in Aspen should be figured out by referring to the USDA zone info.

Planting Calendar for Decorative Kale

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

You can plant decorative kale just a bit earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant decorative kale 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 decorative kale and expect a good harvest is probably September. You probably don't want to wait any later than that or else your decorative kale may not have a chance to grow to maturity. If you are starting your decorative kale indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Aspen. It might get as low as -15°F during the coldest months of winter.

Since the USDA zone info for Aspen is not always accurate the actual date of last frost changes from year to year. Since half of the time in Aspen it frosts late in the year after April 15 be ready to cover your decorative kale if you have a surprise 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.