The USDA Zone info is a great tool for gardeners to help us determine 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.

By referring to the USDA zone info for Coralville you should be able to figure out when it's a good idea to plant parsnip.

Planting Calendar for Parsnip

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

You can plant parsnip a little earlier in the year because they do well in moderate cold.

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

Last Frost Date

On average the last frost has passed is on April 15 in Coralville. It might get as low as -15°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Coralville is not always accurate and the actual date of last frost can change quite a bit from year to year. Since half of the time in Coralville it frosts late in the year after April 15 be ready to protect your parsnip in the event of a late frost.

USDA Zone Info for Coralville

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 Coralville

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