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.

You should be able to determine when you can plant oxalis by using the USDA zone info for Fountain Hills.

Planting Calendar for Oxalis

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

Since oxalis require warm weather it is important to wait until after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant oxalis in Fountain Hills 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. You probably don't want to wait any later than that or else your oxalis may not have a chance to grow to maturity. Starting your oxalis indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Fountain Hills the average date of last frost happens on February 15. It might get as low as 25°F during the coldest months of winter.

Remember that USDA zone info for Fountain Hills is just an average and the actual date of last frost changes from year to year. Half of the time in Fountain Hills you get surprised by a frost after February 15 so make sure that you are ready to cover your oxalis in the event of a surprise late frost.

USDA Zone Info for Fountain Hills

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 Fountain Hills

You may be interested in your other planting guides for Fountain Hills.