The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of estimating when to plant rock cress is to refer to the USDA zone info for Salina.

Planting Calendar for Rock Cress

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

Since rock cress do well in cold you can plant them earlier in the year than other plants that might not handle the cold.

The earliest that you can plant rock cress in Salina 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 rock cress and expect a good harvest is probably September. Any later than that and your rock cress may not have a chance to fully mature. If you are starting your rock cress indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Salina. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Salina may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since half of the time in Salina last frost occurs after April 15 be ready to cover your rock cress if you have one of those late frosts.

USDA Zone Info for Salina

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Salina

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