Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's a good idea to estimate when to plant oxalis by looking at the USDA zone info for Port Isabel.

Planting Calendar for Oxalis

Frost tolerance for oxalis:	Not tolerant of frost.
When to plant:	After the last frost.

It's probably a bad idea to plant oxalis until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant oxalis in Port Isabel 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 oxalis and expect a good harvest is probably September. Any later than that and your oxalis may not have a chance to grow to maturity. If you are starting your oxalis indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on January 31 in Port Isabel. It might get as low as 30°F during the coldest months of winter.

Since the USDA zone info for Port Isabel is not always accurate the actual date of last frost will vary from year to year. Since half of the time in Port Isabel last frost occurs after January 31 be ready to cover your oxalis if you have one of those late frosts.

USDA Zone Info for Port Isabel

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Port Isabel

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