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

The earliest that you can plant portulaca in San Carlos should be determined by looking at the USDA zone info.

Planting Calendar for Portulaca

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

You can not plant portulaca until after the last frost when the weather gets warmer because they do not do well in cold weather.

The earliest that you can plant portulaca in San Carlos is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant portulaca and expect a good harvest is probably September. You probably don't want to wait any later than that or else your portulaca may not have a chance to fully mature. Starting your portulaca indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In San Carlos the average date of last frost happens on January 31. You should expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for San Carlos is just an average the actual date of last frost changes from year to year. Half of the time in San Carlos there is a last frost after January 31 so make sure that you are prepared to cover your portulaca in the event of one of those late frosts.

USDA Zone Info for San Carlos

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in San Carlos

You may be interested in your other planting guides for San Carlos.