One of the first steps you take when you are getting a good idea 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.

You can figure out when it's possible to plant garden cress in Prosser by looking at the USDA zone info.

Planting Calendar for Garden cress

Frost tolerance for garden cress:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since garden cress are not cold tolerant you must wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant garden cress in Prosser is April. However, you really should wait until May if you don't want to take any chances.

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

Last Frost Date

In Prosser the average date of last frost happens on April 15. In the coldest months of winter you can expect an average low temperature of 0°F.

Since the USDA zone info for Prosser may not be accurate from year to year the actual date of last frost changes from year to year. Since half of the time in Prosser you get a frost after April 15 be ready to cover your garden cress if you have a surprise late frost.

USDA Zone Info for Prosser

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Prosser

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