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.

In Granite City you can determine when you can plant parsnip by using the USDA zone info.

Planting Calendar for Parsnip

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

Since parsnip are one of those plants that can tolerate a little bit of cold weather you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant parsnip in Granite City 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. Any later than that and your parsnip may not have a chance to really do well. You can get started a few weeks earlier by starting your parsnip indoors.

Last Frost Date

On average the last frost is on April 15 in Granite City. You should expect an average low temperature of -5°F in the coldest months of winter.

Since the USDA zone info for Granite City may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Half of the time in Granite City you get surprised by a frost after April 15 so always be ready to protect your parsnip in the event of a late frost.

USDA Zone Info for Granite City

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Granite City

You may be interested in your other planting guides for Granite City.