One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You can estimate when it's a good idea to plant flowering kale in Rio Vista by checking out the USDA zone info.

Planting Calendar for Flowering Kale

Frost tolerance for flowering kale:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

You can plant flowering kale a bit earlier in the year because they are moderately cold tolerant.

The earliest that you can plant flowering kale in Rio Vista is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant flowering kale and expect a good harvest is probably October. If you wait any later than that and your flowering kale may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your flowering kale indoors.

Last Frost Date

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

Since the USDA zone info for Rio Vista is an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Rio Vista it frosts late in the year after February 15 be ready to cover your flowering kale if you have a late frost.

USDA Zone Info for Rio Vista

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 Rio Vista

You may be interested in your other planting guides for Rio Vista.