One of the first steps you take when you are determining your gardening schedule is find your 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.

By reviewing the USDA zone info for Winthrop Harbor you will be able to estimate when you can plant geum.

Planting Calendar for Geum

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

Geum are barely cold tolerant which tells us that you can start planting them slightly earlier than other frost tender plants.

The earliest that you can plant geum 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 geum and expect a good harvest is probably August. You probably don't want to wait any later than that or else your geum may not have a chance to grow to maturity. You can get started a little bit earlier by starting your geum indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Winthrop Harbor. You can expect an average low temperature of -15°F in the coldest months of winter.

It's important to remember that USDA zone info for Winthrop Harbor is not always accurate and the actual date of last frost is different every year. Half of the time in Winthrop Harbor you get surprised by a frost after April 15 so make sure that you are ready to protect your geum if you have 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.