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

One way of determining when to plant aurinia is to check out the USDA zone info for Willowbrook.

Planting Calendar for Aurinia

Frost tolerance for aurinia:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since aurinia are one of those plants that can tolerate quite a bit of cold weather you can plant them much earlier in the year than other plants that might not handle the cold.

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

Last Frost Date

On average the last frost has passed is on April 15 in Willowbrook. You can expect an average low temperature of -15°F in the coldest months of winter.

Remember that USDA zone info for Willowbrook may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Willowbrook it frosts late in the year after April 15 so be sure to be ready to protect your aurinia in the event of a surprise late frost.

USDA Zone Info for Willowbrook

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 Willowbrook

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