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

A common way of figuring out when it's the best time to plant oxalis is to examine the USDA zone info for El Reno.

Planting Calendar for Oxalis

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

You really shouldn't plant oxalis until after all chance of frost has passed because they are not cold tolerant.

The earliest that you can plant oxalis in El Reno 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. You probably don't want to wait any later than that or else your oxalis may not have a chance to fully mature. If you are starting your oxalis indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in El Reno. You should expect an average low temperature of 0°F in the coldest months of winter.

Since the USDA zone info for El Reno is just an average the actual date of last frost will vary from year to year. Since half of the time in El Reno there is a last frost after April 15 be ready to protect your oxalis if you have a late frost.

USDA Zone Info for El Reno

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in El Reno

You may be interested in your other planting guides for El Reno.