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

You will be able to figure out when it's a good idea to plant amaranthus by checking out the USDA zone info for Washington.

Planting Calendar for Amaranthus

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

You really shouldn't plant amaranthus until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant amaranthus in Washington 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 amaranthus and expect a good harvest is probably August. You probably don't want to wait any later than that or else your amaranthus may not have a chance to fully mature. You can get started a little bit earlier by starting your amaranthus indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on March 15 in Washington. In the coldest months of winter you can expect an average low temperature of 10°F.

Just be sure to remember that USDA zone info for Washington is not always accurate and the actual date of last frost will vary from year to year. Half of the time in Washington it frosts late in the year after March 15 so be sure to be ready to protect your amaranthus in the event of one of those late frosts.

USDA Zone Info for Washington

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°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 15°F.

Plants to Grow in Washington

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