One of the first steps you take when you are making a decision about 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 Bruno you can estimate when to plant asparagus lettuce by looking at the USDA zone info.

Planting Calendar for Asparagus lettuce

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

Since asparagus lettuce are not cold tolerant it is important to wait until after the last frost has passed before you can plant them.

The earliest that you can plant asparagus lettuce in San Bruno 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 asparagus lettuce and expect a good harvest is probably September. Any later than that and your asparagus lettuce may not have a chance to grow to maturity. Starting your asparagus lettuce indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is January 31 in San Bruno. In the coldest months of winter you should expect an average low temperature of 30°F.

Always keep in mind that USDA zone info for San Bruno is not always accurate and the actual date of last frost will vary from year to year. Since half of the time in San Bruno there is a last frost after January 31 be ready to protect your asparagus lettuce in the event of one of those late frosts.

USDA Zone Info for San Bruno

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 Bruno

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