One of the first steps you take when you are estimating 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.

The USDA zone info for Laredo can be reviewed to figure out when you can plant welsh onion.

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.

Since welsh onion do ok in moderate cold you can plant them slightly earlier in the year than more sensitive plants.

The earliest that you can plant welsh onion in Laredo 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. Any later than that and your welsh onion may not have a chance to really do well. Starting your welsh onion 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 Laredo. In the coldest months of winter you should expect an average low temperature of 20°F.

Since the USDA zone info for Laredo is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Laredo there is a last frost after February 15 be ready to protect your welsh onion if you have a late frost.

USDA Zone Info for Laredo

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 Laredo

You may be interested in your other planting guides for Laredo.