One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Port Lavaca you can estimate when you can plant welsh onion by referring to the USDA zone info.

Planting Calendar for Welsh onion

Frost tolerance for welsh onion:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Welsh onion do well in a tiny bit of cold which tells us that you can plant them just a tiny bit earlier in the year than more sensitive plants.

The earliest that you can plant welsh onion in Port Lavaca is February. However, you really should wait until March if you don't want to take any chances.

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

Last Frost Date

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

Since the USDA zone info for Port Lavaca is an average the actual date of last frost is different every year. Half of the time in Port Lavaca there is a last frost after February 15 so make sure that you are ready to protect your welsh onion if you have one of those late frosts.

USDA Zone Info for Port Lavaca

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 Port Lavaca

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