Before planting it is a good idea to find your USDA Zone info to figure out 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 estimating when to plant trailing portulaca is to look at the USDA zone info for Shasta Lake.

Planting Calendar for Trailing Portulaca

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

It's not a good idea to plant trailing portulaca until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant trailing portulaca in Shasta Lake is March. However, you really should wait until April 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 September. Any later than that and your trailing portulaca may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your trailing portulaca indoors.

Last Frost Date

The average date of last frost is February 15 in Shasta Lake. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Shasta Lake is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Shasta Lake last frost occurs after February 15 so always be ready to cover your trailing portulaca in the event of a late frost.

USDA Zone Info for Shasta Lake

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°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 30°F.

Plants to Grow in Shasta Lake

You may be interested in your other planting guides for Shasta Lake.