Before planting it is a good idea to find your USDA Zone info to determine your garden 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 Riverton can be looked at to figure out when it's a good idea to plant sedum.

Planting Calendar for Sedum

Frost tolerance for sedum:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

You can plant sedum a lot earlier in the year because they are very cold tolerant.

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

Last Frost Date

On average all chance of frost has passed is on May 15 in Riverton. You should expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Riverton may not be accurate from year to year the actual date of last frost will vary from year to year. Since half of the time in Riverton it frosts late in the year after May 15 be ready to protect your sedum if you have a 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.