One of the first steps you take when you are estimating 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.

In Napa you can figure out when it's the best time to plant abutilon by referring to the USDA zone info.

Planting Calendar for Abutilon

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

Since abutilon require warm weather you have to wait until after the last frost has passed before you can plant them.

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

Last Frost Date

In Napa the average date of last frost happens on February 15. You can expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Napa may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Napa you get a frost after February 15 so be sure to be ready to cover your abutilon if you have a late frost.

USDA Zone Info for Napa

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 Napa

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