Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In San Marcos you can determine when it's possible to plant calla lily by referring to the USDA zone info.

Planting Calendar for Calla Lily

Frost tolerance for calla lily:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably not a good idea to plant calla lily until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant calla lily in San Marcos is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant calla lily and expect a good harvest is probably August. You probably don't want to wait any later than that or else your calla lily may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your calla lily indoors.

Last Frost Date

On average the last frost is on March 15 in San Marcos. In the coldest months of winter you can expect an average low temperature of 15°F.

Keep in mind that USDA zone info for San Marcos is an average and the actual date of last frost changes from year to year. Since half of the time in San Marcos last frost occurs after March 15 be ready to cover your calla lily in the event of one of those late frosts.

USDA Zone Info for San Marcos

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in San Marcos

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