One of the first steps you take when you are making a decision about 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.

It's possible to estimate when to plant canna by referring to the USDA zone info for Gardena.

Planting Calendar for Canna

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

Canna are not cold tolerant which means that you need to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant canna in Gardena is February. However, you really should wait until March 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. You probably don't want to wait any later than that or else your canna may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your canna indoors.

Last Frost Date

On average the last frost is on January 31 in Gardena. In the coldest months of winter you should expect an average low temperature of 35°F.

Just be sure to remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Gardena and it changes from year to year. Half of the time in Gardena you get a frost after January 31 so make sure that you are prepared to cover your canna if you have a surprise late frost.

USDA Zone Info for Gardena

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in Gardena

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