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

You can estimate when it's the best time to plant sorrel in Ypsilanti by checking out the USDA zone info.

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 more sensitive plants.

The earliest that you can plant sorrel in Ypsilanti 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 sorrel and expect a good harvest is probably September. If you wait any later than that and your sorrel may not have a chance to fully mature. Starting your sorrel indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Ypsilanti. You can expect an average low temperature of -10°F in the coldest months of winter.

Since the USDA zone info for Ypsilanti may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Ypsilanti you get surprised by a frost after April 15 so just be sure to be ready to protect your sorrel if you have a surprise late frost.

USDA Zone Info for Ypsilanti

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Ypsilanti

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