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.

By using the USDA zone info for Renton you will be able to figure out when to plant garden cress.

Planting Calendar for Garden cress

Frost tolerance for garden cress:	Not tolerant of frost.
When to plant:	After the last frost.

It's not a good idea to plant garden cress until after the last frost because they do not do well in cold weather.

The earliest that you can plant garden cress in Renton 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. If you wait any later than that and your garden cress may not have a chance to really do well. You can get started a few weeks earlier by starting your garden cress indoors.

Last Frost Date

The average date of last frost is March 15 in Renton. In the coldest months of winter you can expect an average low temperature of 15°F.

Since the USDA zone info for Renton is an average the actual date of last frost will vary from year to year. Since half of the time in Renton it frosts late in the year after March 15 be ready to cover your garden cress in the event of a late frost.

USDA Zone Info for Renton

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°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 20°F.

Plants to Grow in Renton

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