One of the first steps you take when you are figuring out your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By reviewing the USDA zone info for Grass Valley you should be able to estimate when it's a good idea to plant firebush.

Planting Calendar for Firebush

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

Since firebush are not cold tolerant it's important to wait until after the last frost before you can plant them.

The earliest that you can plant firebush 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 firebush and expect a good harvest is probably September. Any later than that and your firebush may not have a chance to fully mature. If you are starting your firebush indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Grass Valley the average date of last frost happens on February 15. In the coldest months of winter you should expect an average low temperature of 20°F.

Just be sure to remember that the actual date of last frost is just an average because it is based on the USDA zone info for Grass Valley and it changes from year to year. Half of the time in Grass Valley it frosts late in the year after February 15 so just be sure to be ready to protect your firebush if you have a surprise 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.