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

A way of determining when it's the best time to plant carrots is to look at the USDA zone info for Oregon.

Planting Calendar for Carrots

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

You can plant carrots a bit earlier in the year because they do well in moderate cold.

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

Last Frost Date

On average the last frost has passed is on April 15 in Oregon. It might get as low as -20°F during the coldest months of winter.

Always keep in mind that USDA zone info for Oregon may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in Oregon there is a last frost after April 15 so just be sure to be ready to protect your carrots in the event of a late frost.

USDA Zone Info for Oregon

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 Oregon

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