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

You can figure out when to plant mimulus in Walnut Creek by checking out the USDA zone info.

Planting Calendar for Mimulus

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

Mimulus are not cold tolerant which means that it is important to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant mimulus 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 mimulus and expect a good harvest is probably September. Any later than that and your mimulus may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your mimulus indoors.

Last Frost Date

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

Keep in mind that USDA zone info for Walnut Creek is just an average and the actual date of last frost changes 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 mimulus 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.