One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of figuring out when you can plant calla lily is to refer to the USDA zone info for Smyrna.

Planting Calendar for Calla Lily

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

You should not plant calla lily until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant calla lily in Smyrna 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. If you wait any later than that and your calla lily may not have a chance to grow to maturity. If you are starting your calla lily indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Smyrna the average date of last frost happens on April 15. It might get as low as 5°F during the coldest months of winter.

Since the USDA zone info for Smyrna is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Smyrna there is a last frost after April 15 so just be sure to be ready to cover your calla lily if you have a late frost.

USDA Zone Info for Smyrna

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Smyrna

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