The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By looking at the USDA zone info for Tucson it's a good idea to figure out when to plant gherkins.

Planting Calendar for Gherkins

Frost tolerance for gherkins:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

You should not plant gherkins until after the last frost has passed because they are not cold tolerant.

The earliest that you can plant gherkins in Tucson 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 gherkins and expect a good harvest is probably September. You probably don't want to wait any later than that or else your gherkins may not have a chance to fully mature. If you are starting your gherkins indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on February 15 in Tucson. You can expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for Tucson is not always accurate the actual date of last frost can change quite a bit from year to year. Since half of the time in Tucson you get a frost after February 15 be ready to cover your gherkins if you have a late frost.

USDA Zone Info for Tucson

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 Tucson

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