One of the best tools that you have as gardeners to help us figure out your gardening schedule is the 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.

It's possible to determine when to plant sorrel by referring to the USDA zone info for Rice Lake.

Planting Calendar for Sorrel

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

Since sorrel are moderately cold tolerant you can plant them just a bit earlier in the year than other frost tender plants.

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

Last Frost Date

On average the last frost has passed is on May 15 in Rice Lake. It might get as low as -30°F during the coldest months of winter.

Always keep in mind that USDA zone info for Rice Lake is an average and the actual date of last frost will vary from year to year. Since half of the time in Rice Lake last frost occurs after May 15 be ready to protect your sorrel in the event of a surprise late frost.

USDA Zone Info for Rice Lake

Here is the info for USDA Zone 4a.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-30°F
Highest Expected Low	-25°F

This means that on a really cold year, the coldest it will get is -30°F. On most years you should be prepared to experience lows near -25°F.

Plants to Grow in Rice Lake

You may be interested in your other planting guides for Rice Lake.