Before planting it is a good idea to find your USDA Zone info to figure out 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.

In Winona you can determine when it's a good idea to plant oregano by looking at the USDA zone info.

Planting Calendar for Oregano

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

Since oregano do well in moderate cold you can plant them just a bit earlier in the year than other frost tender plants.

The earliest that you can plant oregano in Winona is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant oregano and expect a good harvest is probably August. Any later than that and your oregano may not have a chance to really do well. You can get started a few weeks earlier by starting your oregano indoors.

Last Frost Date

On average the last frost has passed is on May 15 in Winona. In the coldest months of winter you should expect an average low temperature of -25°F.

Always keep in mind that USDA zone info for Winona 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 Winona there is a last frost after May 15 so make sure that you are prepared to cover your oregano in the event of a surprise late frost.

USDA Zone Info for Winona

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Winona

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