One of the first steps you take when you are estimating your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By looking at the USDA zone info for Rock Falls you should be able to estimate when to plant winter savory.

Planting Calendar for Winter Savory

Frost tolerance for winter savory:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since winter savory do well in moderate cold you can plant them just a bit earlier in the year than more sensitive plants.

The earliest that you can plant winter savory in Rock Falls is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant winter savory and expect a good harvest is probably September. Any later than that and your winter savory may not have a chance to really do well. You can get started a couple of weeks earlier by starting your winter savory indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Rock Falls. You can expect an average low temperature of -15°F in the coldest months of winter.

Keep in mind that USDA zone info for Rock Falls is just an average and the actual date of last frost is different every year. Half of the time in Rock Falls you get surprised by a frost after April 15 so make sure that you are prepared to cover your winter savory if you have a surprise late frost.

USDA Zone Info for Rock Falls

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 Rock Falls

You may be interested in your other planting guides for Rock Falls.