The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of figuring out when it's the best time to plant browallia is to examine the USDA zone info for Walnut Creek.

Planting Calendar for Browallia

Frost tolerance for browallia:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Browallia are not cold tolerant which tells us that it is important to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant browallia in Walnut Creek 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 browallia and expect a good harvest is probably September. If you wait any later than that and your browallia may not have a chance to really do well. You can get started a little bit earlier by starting your browallia indoors.

Last Frost Date

The average date of last frost is February 15 in Walnut Creek. In the coldest months of winter you can expect an average low temperature of 25°F.

It's important to remember that USDA zone info for Walnut Creek is an average and the actual date of last frost will vary from year to year. Since half of the time in Walnut Creek you get surprised by a frost after February 15 be ready to protect your browallia in the event of a surprise late frost.

USDA Zone Info for Walnut Creek

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 Walnut Creek

You may be interested in your other planting guides for Walnut Creek.