The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By referring to the USDA zone info for Sonora you should be able to determine when it's the best time to plant dallas fern.

Planting Calendar for Dallas Fern

Frost tolerance for dallas fern:	Not tolerant of frost.
When to plant:	After the last frost has passed.

It's a bad idea to plant dallas fern until after the last frost because they do not do well in cold weather.

The earliest that you can plant dallas fern in Sonora 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 dallas fern and expect a good harvest is probably September. If you wait any later than that and your dallas fern may not have a chance to really do well. Starting your dallas fern indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost has passed is on February 15 in Sonora. In the coldest months of winter you should expect an average low temperature of 20°F.

Just be sure to remember that USDA zone info for Sonora is not always accurate and the actual date of last frost is different every year. Half of the time in Sonora last frost occurs after February 15 so make sure that you are prepared to protect your dallas fern if you have a late frost.

USDA Zone Info for Sonora

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 Sonora

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