Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of making a decision about when it's a good idea to plant redvein dock is to use the USDA zone info for Minneapolis.

Planting Calendar for Redvein Dock

Frost tolerance for redvein dock:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since redvein dock are barely cold tolerant you can plant them slightly earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant redvein dock in Minneapolis is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant redvein dock and expect a good harvest is probably August. Any later than that and your redvein dock may not have a chance to fully mature. If you are starting your redvein dock indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Minneapolis the average date of last frost happens on May 15. It might get as low as -25°F during the coldest months of winter.

Since the USDA zone info for Minneapolis is just an average the actual date of last frost will vary from year to year. Half of the time in Minneapolis last frost occurs after May 15 so always be ready to cover your redvein dock in the event of one of those late frosts.

USDA Zone Info for Minneapolis

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 Minneapolis

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