Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The USDA zone info for Corona should be read to determine when it's possible to plant oxalis.

Planting Calendar for Oxalis

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

Since oxalis require warm weather you really should wait until after the last frost has passed before you can plant them.

The earliest that you can plant oxalis in Corona 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. Any later than that and your oxalis may not have a chance to really do well. You can get started a little bit earlier by starting your oxalis indoors.

Last Frost Date

The average date of last frost is February 15 in Corona. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for Corona may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in Corona it frosts late in the year after February 15 be ready to cover your oxalis if you have one of those late frosts.

USDA Zone Info for Corona

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 Corona

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