One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can figure out when it's possible to plant canna in Port Arthur by reviewing the USDA zone info.

Planting Calendar for Canna

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

It's probably not a good idea to plant canna until after the last frost has passed because they do not do well in cold weather.

The earliest that you can plant canna in Port Arthur 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. If you wait 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 Port Arthur. You should expect an average low temperature of 20°F in the coldest months of winter.

Always keep in mind that USDA zone info for Port Arthur is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Port Arthur it frosts late in the year after February 15 so always be ready to protect your canna in the event of one of those late frosts.

USDA Zone Info for Port Arthur

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 Port Arthur

You may be interested in your other planting guides for Port Arthur.