One of the best tools that you have as gardeners to help us estimate 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.

One way of determining when it's a good idea to plant celeriac is to consult the USDA zone info for Highland Park.

Planting Calendar for Celeriac

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

Celeriac do well in some cold which tells us that you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant celeriac in Highland Park 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 celeriac and expect a good harvest is probably September. You probably don't want to wait any later than that or else your celeriac may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your celeriac indoors.

Last Frost Date

The average date of last frost is April 15 in Highland Park. It might get as low as -15°F during the coldest months of winter.

Remember that USDA zone info for Highland Park is not always accurate and the actual date of last frost changes from year to year. Half of the time in Highland Park there is a last frost after April 15 so just be sure to be ready to protect your celeriac if you have a surprise late frost.

USDA Zone Info for Highland Park

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 Highland Park

You may be interested in your other planting guides for Highland Park.