Before planting it is a good idea to find your USDA Zone info to determine 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.

In Zion you can figure out when it's possible to plant oxalis by referring to the USDA zone info.

Planting Calendar for Oxalis

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

You should not plant oxalis until after the last frost has passed because they do not do well in cold weather.

The earliest that you can plant oxalis in Zion is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant oxalis and expect a good harvest is probably August. If you wait any later than that and your oxalis may not have a chance to really do well. You can get started a few weeks earlier by starting your oxalis indoors.

Last Frost Date

The average date of last frost is April 15 in Zion. It might get as low as -15°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Zion is not always accurate and the actual date of last frost can change quite a bit from year to year. Half of the time in Zion it frosts late in the year after April 15 so always be ready to cover your oxalis in the event of a late frost.

USDA Zone Info for Zion

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Zion

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