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.

The USDA zone info for Onalaska can be used to determine when you can plant creeping zinnia.

Planting Calendar for Creeping Zinnia

Frost tolerance for creeping zinnia:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Creeping Zinnia are one of those plants that can tolerate a tiny bit of cold weather which tells us that you can plant them slightly earlier than more sensitive plants.

The earliest that you can plant creeping zinnia in Onalaska 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 creeping zinnia and expect a good harvest is probably August. Any later than that and your creeping zinnia may not have a chance to grow to maturity. You can get started a little bit earlier by starting your creeping zinnia indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Onalaska. You can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Onalaska is an average the actual date of last frost will vary from year to year. Since half of the time in Onalaska you get surprised by a frost after May 15 be ready to cover your creeping zinnia if you have one of those late frosts.

USDA Zone Info for Onalaska

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 Onalaska

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