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.

A way of determining when to plant mimulus is to examine the USDA zone info for Tolleson.

Planting Calendar for Mimulus

Frost tolerance for mimulus:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

You should not plant mimulus until after the last frost because they do not do well in cold weather.

The earliest that you can plant mimulus in Tolleson 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. If you wait any later than that and your mimulus may not have a chance to grow to maturity. You can get started a little bit earlier by starting your mimulus indoors.

Last Frost Date

The average date of last frost is February 15 in Tolleson. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Tolleson is an average the actual date of last frost changes from year to year. Since half of the time in Tolleson you get a frost after February 15 be ready to protect your mimulus if you have a late frost.

USDA Zone Info for Tolleson

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 Tolleson

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