One of the best tools that you have as gardeners to help us figure out your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By reviewing the USDA zone info for Kirksville it's possible to figure out when it's possible to plant catharanthus.

Planting Calendar for Catharanthus

Frost tolerance for catharanthus:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since catharanthus are not cold tolerant you have to wait until after the last frost has passed before you can plant them.

The earliest that you can plant catharanthus 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 catharanthus and expect a good harvest is probably August. If you wait any later than that and your catharanthus may not have a chance to really do well. Starting your catharanthus indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Kirksville. In the coldest months of winter you can expect an average low temperature of -15°F.

Keep in mind that USDA zone info for Kirksville is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Kirksville there is a last frost after April 15 so make sure that you are prepared to protect your catharanthus if you have a surprise 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.