One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. 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 estimating when it's possible to plant oregano is to examine the USDA zone info for Pewaukee.

Planting Calendar for Oregano

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

Oregano tend to make it in a little bit of cold which tells us that you can plant them a little bit earlier in the year than other frost tender plants.

The earliest that you can plant oregano in Pewaukee 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 oregano and expect a good harvest is probably September. You probably don't want to wait any later than that or else your oregano may not have a chance to grow to maturity. You can get started a little bit earlier by starting your oregano indoors.

Last Frost Date

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

Since the USDA zone info for Pewaukee may not be accurate from year to year the actual date of last frost changes from year to year. Since half of the time in Pewaukee there is a last frost after April 15 be ready to protect your oregano if you have a surprise late frost.

USDA Zone Info for Pewaukee

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 Pewaukee

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