Before planting it is a good idea to find your USDA Zone info to determine 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 Rock Falls you can figure out when you can plant lavender by using the USDA zone info.

Planting Calendar for Lavender

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

You can plant lavender a little earlier in the year because they are one of those plants that can tolerate a little bit of cold weather.

The earliest that you can plant lavender 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 lavender and expect a good harvest is probably September. Any later than that and your lavender may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your lavender indoors.

Last Frost Date

In Rock Falls the average date of last frost happens on April 15. You should expect an average low temperature of -15°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Rock Falls may not be accurate from year to year 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 protect your lavender in the event of 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.