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.

You can figure out when you can plant canna in Louisville by checking out the USDA zone info.

Planting Calendar for Canna

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

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

The earliest that you can plant canna in Louisville is April. However, you really should wait until May if you don't want to take any chances.

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

Last Frost Date

The average date of last frost is March 15 in Louisville. You can expect an average low temperature of 10°F in the coldest months of winter.

Since the USDA zone info for Louisville is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Louisville you get surprised by a frost after March 15 be ready to protect your canna if you have a late frost.

USDA Zone Info for Louisville

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Louisville

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