The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Rock Springs can be used to estimate when it's possible to plant decorative kale.

Planting Calendar for Decorative Kale

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

Decorative Kale are moderately cold tolerant which tells us that you can plant them earlier than other frost tender plants.

The earliest that you can plant decorative kale in Rock Springs 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 fully mature. You can get started a little bit earlier by starting your decorative kale indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Rock Springs. In the coldest months of winter you can expect an average low temperature of -20°F.

It's important to remember that USDA zone info for Rock Springs is an average and the actual date of last frost changes from year to year. Half of the time in Rock Springs you get surprised by a frost after April 15 so be sure to be ready to cover your decorative kale in the event of a surprise late frost.

USDA Zone Info for Rock Springs

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 Rock Springs

You may be interested in your other planting guides for Rock Springs.