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.

It's a good idea to estimate when you can plant twinspur by reviewing the USDA zone info for Chattanooga.

Planting Calendar for Twinspur

Frost tolerance for twinspur:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since twinspur are one of those plants that can tolerate a little bit of cold weather you can plant them a little bit earlier in the year than other frost tender plants.

The earliest that you can plant twinspur in Chattanooga 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 twinspur and expect a good harvest is probably September. You probably don't want to wait any later than that or else your twinspur may not have a chance to really do well. You can get started a few weeks earlier by starting your twinspur indoors.

Last Frost Date

The average date of last frost is April 15 in Chattanooga. You should expect an average low temperature of 5°F in the coldest months of winter.

Always keep in mind that USDA zone info for Chattanooga may not be accurate from year to year and the actual date of last frost changes from year to year. Half of the time in Chattanooga there is a last frost after April 15 so be sure to be ready to protect your twinspur if you have a late frost.

USDA Zone Info for Chattanooga

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Chattanooga

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