The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of determining when it's possible to plant alternanthera is to look at the USDA zone info for Delavan.

Planting Calendar for Alternanthera

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

Alternanthera require warm weather which tells us that it's necessary 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 alternanthera in Delavan is April. However, you really should wait until May 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 fully mature. You can get started a little bit earlier by starting your alternanthera indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Delavan. You should expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Delavan is an average the actual date of last frost is different every year. Since half of the time in Delavan it frosts late in the year after April 15 be ready to cover your alternanthera if you have a late frost.

USDA Zone Info for Delavan

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Delavan

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