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.

You should be able to figure out when you can plant catharanthus by referring to the USDA zone info for Fairfield.

Planting Calendar for Catharanthus

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

Since catharanthus are not cold tolerant it's important to wait until after the last frost before you can plant them.

The earliest that you can plant catharanthus in Fairfield is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant catharanthus and expect a good harvest is probably September. Any later than that and your catharanthus may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your catharanthus indoors.

Last Frost Date

On average the last frost is on February 15 in Fairfield. In the coldest months of winter you can expect an average low temperature of 25°F.

Just be sure to remember that USDA zone info for Fairfield is an average and the actual date of last frost changes from year to year. Half of the time in Fairfield it frosts late in the year after February 15 so be sure to be ready to protect your catharanthus if you have a late frost.

USDA Zone Info for Fairfield

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Fairfield

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