One of the first steps you take when you are determining 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.

In San Diego you can determine when it's a good idea to plant garden cress by reviewing the USDA zone info.

Planting Calendar for Garden cress

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

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

The earliest that you can plant garden cress in San Diego is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant garden cress and expect a good harvest is probably September. Any later than that and your garden cress may not have a chance to fully mature. Starting your garden cress indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

The average date of last frost is January 31 in San Diego. You can expect an average low temperature of 35°F in the coldest months of winter.

Just be sure to remember that USDA zone info for San Diego is an average and the actual date of last frost is different every year. Since half of the time in San Diego you get surprised by a frost after January 31 be ready to cover your garden cress if you have a surprise late frost.

USDA Zone Info for San Diego

Here is the info for USDA Zone 10b.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	35°F
Highest Expected Low	40°F

This means that on a really cold year, the coldest it will get is 35°F. On most years you should be prepared to experience lows near 40°F.

Plants to Grow in San Diego

You may be interested in your other planting guides for San Diego.