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

The earliest that you can plant tomatos in San Rafael should be determined by reviewing the USDA zone info.

Planting Calendar for Tomatos

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

It's a bad idea to plant tomatos until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant tomatos in San Rafael 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 tomatos and expect a good harvest is probably September. Any later than that and your tomatos may not have a chance to really do well. If you are starting your tomatos indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost has passed is on January 31 in San Rafael. You should expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for San Rafael is not always accurate the actual date of last frost is different every year. Since half of the time in San Rafael it frosts late in the year after January 31 be ready to cover your tomatos if you have a late frost.

USDA Zone Info for San Rafael

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in San Rafael

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