The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Knoxville you can figure out when it's possible to plant celosia by checking out the USDA zone info.

Planting Calendar for Celosia

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

It's not a good idea to plant celosia until after the last frost when the weather gets warmer because they do not do well in cold weather.

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

Last Frost Date

The average date of last frost is April 15 in Knoxville. You can expect an average low temperature of -15°F in the coldest months of winter.

Always keep in mind that USDA zone info for Knoxville may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Knoxville you get surprised by a frost after April 15 so be sure to be ready to protect your celosia in the event of a late frost.

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.