Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

One way of figuring out when to plant parsley is to examine the USDA zone info for Colby.

Planting Calendar for Parsley

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

Since parsley 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 plants that are more sensitive to the cold.

The earliest that you can plant parsley in Colby 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 parsley and expect a good harvest is probably September. Any later than that and your parsley may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your parsley indoors.

Last Frost Date

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

Keep in mind that USDA zone info for Colby may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Colby it frosts late in the year after April 15 so make sure that you are ready to cover your parsley in the event of a surprise late frost.

USDA Zone Info for Colby

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 Colby

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