One of the first steps you take when you are determining your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

By using the USDA zone info for Sahuarita it's a good idea to determine when it's the best time to plant oxalis.

Planting Calendar for Oxalis

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

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 Sahuarita 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 oxalis and expect a good harvest is probably September. If you wait any later than that and your oxalis may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your oxalis indoors.

Last Frost Date

The average date of last frost is February 15 in Sahuarita. It might get as low as 20°F during the coldest months of winter.

Since the USDA zone info for Sahuarita is an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Sahuarita last frost occurs after February 15 be ready to cover your oxalis in the event of one of those late frosts.

USDA Zone Info for Sahuarita

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 Sahuarita

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