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 figuring out when you can plant creeping zinnia is to use the USDA zone info for Boulder City.

Planting Calendar for Creeping Zinnia

Frost tolerance for creeping zinnia:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Creeping Zinnia do ok in moderate cold which tells us that you can plant them slightly earlier than other frost tender plants.

The earliest that you can plant creeping zinnia in Boulder City is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant creeping zinnia and expect a good harvest is probably September. You probably don't want to wait any later than that or else your creeping zinnia may not have a chance to really do well. You can get started a couple of weeks earlier by starting your creeping zinnia indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Boulder City. In the coldest months of winter you should expect an average low temperature of 25°F.

Just be sure to remember that USDA zone info for Boulder City is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Boulder City it frosts late in the year after February 15 so make sure that you are ready to protect your creeping zinnia if you have one of those late frosts.

USDA Zone Info for Boulder City

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 Boulder City

You may be interested in your other planting guides for Boulder City.