When can I plant Trailing Portulaca in Zone 1b

The USDA Zone info is a great tool for gardeners to help us figure out our gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

In Zone 1b you can figure out when it's the best time to plant trailing portulaca by using the USDA zone info.


Planting Calendar for Trailing Portulaca

Frost tolerance for trailing portulaca: Not tolerant of frost.
When you should plant them: After the last frost when the weather gets warmer.

Since trailing portulaca are not cold tolerant it is necessary to wait until after the last frost before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant trailing portulaca
Possibly ok, but a risky time to plant trailing portulaca
Probably not a good time to plant trailing portulaca

The earliest that you can plant trailing portulaca in Zone 1b is June. However, you really should wait until July 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 July. Any later than that and your trailing portulaca may not have a chance to grow to maturity. Starting your trailing portulaca indoors is a great way to get them started a few weeks earlier.

Last Frost Date

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

Remember that USDA zone info for Zone 1b is just an average and our actual date of last frost will vary from year to year. Since half of the time in Zone 1b we get surprised by a frost after June 15 be ready to cover your trailing portulaca 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 our other planting guides for Zone 1b.