One of the first steps you take when you are estimating 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.

The best time to plant sedum in Zone 1b should be determined by checking out the USDA zone info.

Planting Calendar for Sedum

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

Sedum do well in cold which tells us that you can plant them much earlier than plants that are more sensitive to the cold.

The earliest that you can plant sedum in Zone 1b is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant sedum and expect a good harvest is probably July. Any later than that and your sedum may not have a chance to really do well. If you are starting your sedum indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Zone 1b the average date of last frost happens on June 15. You should expect an average low temperature of -55°F in the coldest months of winter.

Since the USDA zone info for Zone 1b is just an average the actual date of last frost will vary from year to year. Half of the time in Zone 1b there is a last frost after June 15 so always be ready to protect your sedum in the event of a late frost.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)	June 15
Average Date of First Frost (fall)	July 15
Lowest Expected Low	-55°F
Highest Expected Low	-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in your other planting guides for Zone 1b.