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

The first opportunity to plant amaranthus in Grass Valley can be estimated by looking at the USDA zone info.

Planting Calendar for Amaranthus

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

Amaranthus are not cold tolerant which tells us that it is important to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant amaranthus in Grass Valley is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant amaranthus and expect a good harvest is probably September. Any later than that and your amaranthus may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your amaranthus indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Grass Valley. You can expect an average low temperature of 20°F in the coldest months of winter.

Since the USDA zone info for Grass Valley is not always accurate the actual date of last frost is different every year. Since half of the time in Grass Valley last frost occurs after February 15 be ready to protect your amaranthus if you have a late frost.

USDA Zone Info for Grass Valley

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Grass Valley

You may be interested in your other planting guides for Grass Valley.