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

A common way of estimating when it's the best time to plant catharanthus is to look at the USDA zone info for West Memphis.

Planting Calendar for Catharanthus

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

You really shouldn't plant catharanthus until after the last frost has passed because they require warm weather.

The earliest that you can plant catharanthus in West Memphis 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. Any later than that and your catharanthus may not have a chance to fully mature. Starting your catharanthus indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in West Memphis. It might get as low as 5°F during the coldest months of winter.

Since the USDA zone info for West Memphis is not always accurate the actual date of last frost will vary from year to year. Half of the time in West Memphis it frosts late in the year after April 15 so make sure that you are ready to cover your catharanthus if you have a late frost.

USDA Zone Info for West Memphis

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 West Memphis

You may be interested in your other planting guides for West Memphis.