Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's possible to determine when you can plant catharanthus by checking out the USDA zone info for Arkadelphia.

Planting Calendar for Catharanthus

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

Since catharanthus are not cold tolerant you need to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant catharanthus in Arkadelphia 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. You can get started a couple of weeks earlier by starting your catharanthus indoors.

Last Frost Date

On average all chance of frost has passed is on March 15 in Arkadelphia. You should expect an average low temperature of 10°F in the coldest months of winter.

Since the USDA zone info for Arkadelphia 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 Arkadelphia there is a last frost after March 15 be ready to protect your catharanthus if you have a late frost.

USDA Zone Info for Arkadelphia

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Arkadelphia

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