The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of determining when it's the best time to plant twinspur is to use the USDA zone info for Port Arthur.

Planting Calendar for Twinspur

Frost tolerance for twinspur:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Twinspur do ok in mild cold which tells us that you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant twinspur in Port Arthur is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant twinspur and expect a good harvest is probably October. If you wait any later than that and your twinspur may not have a chance to grow to maturity. You can get started a little bit earlier by starting your twinspur indoors.

Last Frost Date

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

Remember that the actual date of last frost is an average because it is based on the USDA zone info for Port Arthur and it will vary from year to year. Half of the time in Port Arthur you get a frost after February 15 so make sure that you are prepared to protect your twinspur in the event of a surprise 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.