Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Buffalo Grove you can figure out when you can plant periwinkles by referring to the USDA zone info.

Planting Calendar for Periwinkles

Frost tolerance for periwinkles:	Not tolerant of frost.
When to plant:	After the last frost.

You should not plant periwinkles until after the last frost because they do not do well in cold weather.

The earliest that you can plant periwinkles in Buffalo Grove 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 periwinkles and expect a good harvest is probably August. If you wait any later than that and your periwinkles may not have a chance to grow to maturity. Starting your periwinkles indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Buffalo Grove. In the coldest months of winter you can expect an average low temperature of -15°F.

Just be sure to remember that USDA zone info for Buffalo Grove is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Buffalo Grove there is a last frost after April 15 so be sure to be ready to protect your periwinkles in the event of a late frost.

USDA Zone Info for Buffalo Grove

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 Buffalo Grove

You may be interested in your other planting guides for Buffalo Grove.