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.

It's a good idea to determine when to plant parsnip by referring to the USDA zone info for Dubuque.

Planting Calendar for Parsnip

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

Parsnip are moderately cold tolerant which tells us that you can get them planted earlier than more sensitive plants.

The earliest that you can plant parsnip in Dubuque 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 couple of weeks earlier by starting your parsnip indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Dubuque. You can expect an average low temperature of -20°F in the coldest months of winter.

Remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Dubuque and it will vary from year to year. Since half of the time in Dubuque last frost occurs after April 15 be ready to protect your parsnip in the event of a surprise late frost.

USDA Zone Info for Dubuque

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Dubuque

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