One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By reviewing the USDA zone info for Port Arthur it's a good idea to estimate when it's possible to plant schizanthus.

Planting Calendar for Schizanthus

Frost tolerance for schizanthus:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

It's probably a bad idea to plant schizanthus until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant schizanthus in Port Arthur 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 schizanthus and expect a good harvest is probably September. You probably don't want to wait any later than that or else your schizanthus may not have a chance to fully mature. Starting your schizanthus indoors is a great way to get them started a few weeks earlier.

Last Frost Date

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

Keep in mind that USDA zone info for Port Arthur is not always accurate and the actual date of last frost is different every year. Half of the time in Port Arthur there is a last frost after February 15 so just be sure to be ready to protect your schizanthus if you have a late frost.

USDA Zone Info for Port Arthur

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 Port Arthur

You may be interested in your other planting guides for Port Arthur.