One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The best time to plant indian cress in Renton can be determined by looking at the USDA zone info.

Planting Calendar for Indian cress

Frost tolerance for indian cress:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since indian cress are not cold tolerant you need to wait until after the last frost has passed before you can plant them.

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

Last Frost Date

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

Keep in mind that USDA zone info for Renton is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Renton it frosts late in the year after March 15 so make sure that you are ready to cover your indian cress if you have one of those late frosts.

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.