One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's possible to determine when it's the best time to plant tomatos by checking out the USDA zone info for Oklahoma City.

Planting Calendar for Tomatos

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

You can not plant tomatos until after the last frost because they do not do well in cold weather.

The earliest that you can plant tomatos in Oklahoma City 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 tomatos and expect a good harvest is probably August. Any later than that and your tomatos may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your tomatos indoors.

Last Frost Date

On average the last frost is on April 15 in Oklahoma City. You can expect an average low temperature of 0°F in the coldest months of winter.

Since the USDA zone info for Oklahoma City may not be accurate from year to year the actual date of last frost is different every year. Since half of the time in Oklahoma City you get a frost after April 15 be ready to cover your tomatos in the event of a late frost.

USDA Zone Info for Oklahoma City

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 Oklahoma City

You may be interested in your other planting guides for Oklahoma City.