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.

In Andover you can determine when it's a good idea to plant portulaca by using the USDA zone info.

Planting Calendar for Portulaca

Frost tolerance for portulaca:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably not a good idea to plant portulaca until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant portulaca in Andover 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 portulaca and expect a good harvest is probably August. You probably don't want to wait any later than that or else your portulaca may not have a chance to fully mature. You can get started a little bit earlier by starting your portulaca indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Andover. It might get as low as -25°F during the coldest months of winter.

Since the USDA zone info for Andover is not always accurate the actual date of last frost is different every year. Half of the time in Andover it frosts late in the year after May 15 so make sure that you are prepared to protect your portulaca in the event of one of those late frosts.

USDA Zone Info for Andover

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 Andover

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