One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can figure out when to plant alternanthera in Rawlins by referring to the USDA zone info.

Planting Calendar for Alternanthera

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

It's probably a bad idea to plant alternanthera until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant alternanthera in Rawlins is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant alternanthera and expect a good harvest is probably August. You probably don't want to wait any later than that or else your alternanthera may not have a chance to grow to maturity. Starting your alternanthera indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost is on May 15 in Rawlins. In the coldest months of winter you should expect an average low temperature of -25°F.

Remember that USDA zone info for Rawlins may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Rawlins it frosts late in the year after May 15 so make sure that you are ready to protect your alternanthera if you have a late frost.

USDA Zone Info for Rawlins

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°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 -20°F.

Plants to Grow in Rawlins

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