Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of figuring out when it's possible to plant canna is to look at the USDA zone info for Grass Valley.

Planting Calendar for Canna

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

Since canna require warm weather you need to wait until after the last frost before you can plant them.

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

Last Frost Date

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

It's important to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Grass Valley and it can change quite a bit from year to year. Half of the time in Grass Valley you get surprised by a frost after February 15 so make sure that you are ready to cover your canna in the event of one of those late frosts.

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.