One of the best tools that you have as gardeners to help us figure out your gardening schedule is the 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.

The USDA zone info for Knoxville can be reviewed to determine when it's a good idea to plant lantana.

Planting Calendar for Lantana

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

You really shouldn't plant lantana until after the last frost because they are not cold tolerant.

The earliest that you can plant lantana in Knoxville 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 lantana and expect a good harvest is probably August. If you wait any later than that and your lantana may not have a chance to grow to maturity. If you are starting your lantana indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

The average date of last frost is April 15 in Knoxville. It might get as low as -15°F during the coldest months of winter.

Since the USDA zone info for Knoxville may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since half of the time in Knoxville last frost occurs after April 15 be ready to protect your lantana in the event of one of those late frosts.

USDA Zone Info for Knoxville

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

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

Plants to Grow in Knoxville

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