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.

You can figure out when you can plant eggplants in San Ramon by looking at the USDA zone info.

Planting Calendar for Eggplants

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

Eggplants do not do well in cold weather which means that you must wait until it warms up after all chance of frost has passed before you can plant them.

The earliest that you can plant eggplants in San Ramon 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 eggplants and expect a good harvest is probably September. You probably don't want to wait any later than that or else your eggplants may not have a chance to grow to maturity. Starting your eggplants indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In San Ramon the average date of last frost happens on February 15. It might get as low as 25°F during the coldest months of winter.

Since the USDA zone info for San Ramon is just an average the actual date of last frost will vary from year to year. Half of the time in San Ramon you get a frost after February 15 so make sure that you are prepared to protect your eggplants in the event of a surprise late frost.

USDA Zone Info for San Ramon

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 San Ramon

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