The USDA Zone info is a great tool for gardeners to help us estimate 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.

One way of getting a good idea when it's possible to plant summer savory is to look at the USDA zone info for Grinnell.

Planting Calendar for Summer Savory

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

You can plant summer savory just a tiny bit earlier in the year because they are barely cold tolerant.

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

Last Frost Date

On average the last frost is on April 15 in Grinnell. It might get as low as -20°F during the coldest months of winter.

It's important to remember that USDA zone info for Grinnell may not be accurate from year to year and the actual date of last frost is different every year. Since half of the time in Grinnell there is a last frost after April 15 be ready to cover your summer savory if you have a late frost.

USDA Zone Info for Grinnell

Here is the info for USDA Zone 5a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-20°F
Highest Expected Low	-15°F

This means that on a really cold year, the coldest it will get is -20°F. On most years you should be prepared to experience lows near -15°F.

Plants to Grow in Grinnell

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