The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You should be able to figure out when to plant flower-of-an-hour by checking out the USDA zone info for Jefferson City.

Planting Calendar for Flower-of-an-Hour

Frost tolerance for flower-of-an-hour:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since flower-of-an-hour do ok in moderate cold you can plant them slightly earlier in the year than more sensitive plants.

The earliest that you can plant flower-of-an-hour in Jefferson City 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 flower-of-an-hour and expect a good harvest is probably August. If you wait any later than that and your flower-of-an-hour may not have a chance to really do well. Starting your flower-of-an-hour indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Jefferson City. It might get as low as 0°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Jefferson City is an average and the actual date of last frost is different every year. Half of the time in Jefferson City there is a last frost after April 15 so be sure to be ready to protect your flower-of-an-hour if you have a surprise late frost.

USDA Zone Info for Jefferson City

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Jefferson City

You may be interested in your other planting guides for Jefferson City.