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.

One way of making a decision about when you can plant swan river daisy is to use the USDA zone info for Boulder City.

Planting Calendar for Swan River Daisy

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

Swan River Daisy are not cold tolerant which means that you need 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 swan river daisy 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 swan river daisy and expect a good harvest is probably September. You probably don't want to wait any later than that or else your swan river daisy may not have a chance to fully mature. If you are starting your swan river daisy indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on February 15 in Boulder City. You can expect an average low temperature of 25°F in the coldest months of winter.

Keep in mind that USDA zone info for Boulder City is just an average and the actual date of last frost will vary from year to year. Since half of the time in Boulder City there is a last frost after February 15 be ready to protect your swan river daisy if you have a surprise 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.