Before planting it is a good idea to find your USDA Zone info to estimate 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.

One way of making a decision about when it's the best time to plant trailing portulaca is to use the USDA zone info for Baraboo.

Planting Calendar for Trailing Portulaca

Frost tolerance for trailing portulaca:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

You can not plant trailing portulaca until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant trailing portulaca in Baraboo 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 trailing portulaca and expect a good harvest is probably August. If you wait any later than that and your trailing portulaca may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your trailing portulaca indoors.

Last Frost Date

On average the last frost has passed is on May 15 in Baraboo. You can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Baraboo is not always accurate the actual date of last frost will vary from year to year. Half of the time in Baraboo you get a frost after May 15 so always be ready to cover your trailing portulaca if you have one of those late frosts.

USDA Zone Info for Baraboo

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 Baraboo

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