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

You will be able to estimate when it's a good idea to plant flowering kale by looking at the USDA zone info for Riverton.

Planting Calendar for Flowering Kale

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

You can plant flowering kale just a bit earlier in the year because they do well in moderate cold.

The earliest that you can plant flowering kale in Riverton 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 flowering kale and expect a good harvest is probably August. Any later than that and your flowering kale may not have a chance to fully mature. You can get started a few weeks earlier by starting your flowering kale indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Riverton. In the coldest months of winter you should expect an average low temperature of -25°F.

Always keep in mind that USDA zone info for Riverton is not always accurate and the actual date of last frost will vary from year to year. Since half of the time in Riverton there is a last frost after May 15 be ready to protect your flowering kale in the event of a surprise late frost.

USDA Zone Info for Riverton

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Riverton

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