One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of determining when it's the best time to plant calla lily is to refer to the USDA zone info for Shafter.

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 require warm weather.

The earliest that you can plant calla lily in Shafter 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 calla lily and expect a good harvest is probably September. If you wait any later than that and your calla lily may not have a chance to grow to maturity. Starting your calla lily indoors is a great way to get them started a little bit earlier.

Last Frost Date

On average all chance of frost has passed is on February 15 in Shafter. You should expect an average low temperature of 20°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Shafter is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Shafter you get a frost after February 15 so make sure that you are ready to cover your calla lily in the event of one of those late frosts.

USDA Zone Info for Shafter

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Shafter

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