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

By looking at the USDA zone info for Casper you should be able to estimate when it's the best time to plant arctotis.

Planting Calendar for Arctotis

Frost tolerance for arctotis:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since arctotis do well in moderate cold you can plant them a little earlier in the year than other frost tender plants.

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

Last Frost Date

On average the last frost is on April 15 in Casper. In the coldest months of winter you can expect an average low temperature of -20°F.

Just be sure to remember that USDA zone info for Casper is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Casper you get a frost after April 15 so just be sure to be ready to protect your arctotis if you have one of those late frosts.

USDA Zone Info for Casper

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Casper

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