One of the best tools that you have as gardeners to help us determine your gardening schedule is the 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.

The USDA zone info for Boulder City should be reviewed to figure out when you can plant chrysanthemum.

Planting Calendar for Chrysanthemum

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

Since chrysanthemum are not cold tolerant you have to wait until after the last frost before you can plant them.

The earliest that you can plant chrysanthemum in Boulder City 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 chrysanthemum and expect a good harvest is probably September. If you wait any later than that and your chrysanthemum may not have a chance to grow to maturity. You can get started a little bit earlier by starting your chrysanthemum indoors.

Last Frost Date

On average the last frost has passed is on February 15 in Boulder City. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Boulder City is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Boulder City you get a frost after February 15 be ready to protect your chrysanthemum in the event of a late frost.

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.