One of the best tools that you have as gardeners to help us estimate 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.

The USDA zone info for Winthrop Harbor should be read to estimate when you can plant redvein dock.

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.

You can plant redvein dock a bit earlier in the year because they do ok in moderate cold.

The earliest that you can plant redvein dock in Winthrop Harbor 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 redvein dock and expect a good harvest is probably August. If you wait any later than that and your redvein dock may not have a chance to grow to maturity. If you are starting your redvein dock indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

In Winthrop Harbor the average date of last frost happens on April 15. You should expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Winthrop Harbor may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since half of the time in Winthrop Harbor you get surprised by a frost after April 15 be ready to protect your redvein dock in the event of a late frost.

USDA Zone Info for Winthrop Harbor

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Winthrop Harbor

You may be interested in your other planting guides for Winthrop Harbor.