Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

In Kirksville you can estimate when to plant sunflowers by reviewing the USDA zone info.

Planting Calendar for Sunflowers

Frost tolerance for sunflowers:	Not tolerant of frost.
When to plant:	After the last frost.

You should not plant sunflowers until after the last frost because they are not cold tolerant.

The earliest that you can plant sunflowers in Kirksville 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 sunflowers and expect a good harvest is probably August. You probably don't want to wait any later than that or else your sunflowers may not have a chance to grow to maturity. You can get started a little bit earlier by starting your sunflowers indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Kirksville. You can expect an average low temperature of -15°F in the coldest months of winter.

Since the USDA zone info for Kirksville may not be accurate from year to year the actual date of last frost changes from year to year. Since half of the time in Kirksville you get surprised by a frost after April 15 be ready to protect your sunflowers in the event of a late frost.

USDA Zone Info for Kirksville

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 Kirksville

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