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

In Ulysses you can estimate when you can plant catharanthus by checking out the USDA zone info.

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 all chance of frost has passed because they require warm weather.

The earliest that you can plant catharanthus in Ulysses 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 really do well. You can get started a little bit earlier by starting your catharanthus indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Ulysses. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Ulysses may not be accurate from year to year the actual date of last frost will vary from year to year. Since half of the time in Ulysses you get a frost after April 15 be ready to cover your catharanthus in the event of a late frost.

USDA Zone Info for Ulysses

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°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 -5°F.

Plants to Grow in Ulysses

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