The USDA Zone info is a great tool for gardeners to help us figure out your gardening 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 determining when you can plant catharanthus is to look at the USDA zone info for La Marque.

Planting Calendar for Catharanthus

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

You can not plant catharanthus until after the last frost because they are not cold tolerant.

The earliest that you can plant catharanthus in La Marque 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 really do well. Starting your catharanthus indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is February 15 in La Marque. You should expect an average low temperature of 20°F in the coldest months of winter.

Always keep in mind that USDA zone info for La Marque 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 La Marque there is a last frost after February 15 so be sure to be ready to cover your catharanthus in the event of a late frost.

USDA Zone Info for La Marque

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in La Marque

You may be interested in your other planting guides for La Marque.