One of the best tools that you have as gardeners to help us figure out your gardening schedule is the 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.

A way of estimating when you can plant blue throatwort is to consult the USDA zone info for Port Arthur.

Planting Calendar for Blue Throatwort

Frost tolerance for blue throatwort:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Blue Throatwort are not cold tolerant which tells us that you have to wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant blue throatwort 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 blue throatwort and expect a good harvest is probably September. You probably don't want to wait any later than that or else your blue throatwort may not have a chance to really do well. You can get started a little bit earlier by starting your blue throatwort indoors.

Last Frost Date

On average the last frost is on February 15 in Port Arthur. You can expect an average low temperature of 20°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Port Arthur is just an average and the actual date of last frost changes from year to year. Half of the time in Port Arthur you get surprised by a frost after February 15 so be sure to be ready to protect your blue throatwort in the event of 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.