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.

The USDA zone info for Winthrop Harbor can be reffered to in order to estimate when to plant plectranthus.

Planting Calendar for Plectranthus

Frost tolerance for plectranthus:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since plectranthus do not do well in cold weather it's necessary to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant plectranthus in Winthrop Harbor 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 plectranthus and expect a good harvest is probably August. If you wait any later than that and your plectranthus may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your plectranthus indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Winthrop Harbor. In the coldest months of winter you should expect an average low temperature of -15°F.

Always keep in mind that USDA zone info for Winthrop Harbor is an average and the actual date of last frost changes from year to year. Half of the time in Winthrop Harbor you get a frost after April 15 so make sure that you are prepared to protect your plectranthus 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.