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.

By using the USDA zone info for Cleveland it's possible to figure out when it's a good idea to plant rock cress.

Planting Calendar for Rock Cress

Frost tolerance for rock cress:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Rock Cress do ok in a bit of cold which tells us that you can plant them a lot earlier in the year than other plants that might not handle the cold.

The earliest that you can plant rock cress in Cleveland is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant rock cress and expect a good harvest is probably October. Any later than that and your rock cress may not have a chance to fully mature. You can get started a little bit earlier by starting your rock cress indoors.

Last Frost Date

The average date of last frost is February 15 in Cleveland. It might get as low as 20°F during the coldest months of winter.

Remember that the actual date of last frost is just an average because it is based on the USDA zone info for Cleveland and it is different every year. Half of the time in Cleveland it frosts late in the year after February 15 so make sure that you are ready to protect your rock cress if you have one of those late frosts.

USDA Zone Info for Cleveland

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°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 25°F.

Plants to Grow in Cleveland

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