One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A way of making a decision about when it's possible to plant broccoli is to examine the USDA zone info for Vallejo.

Planting Calendar for Broccoli

Frost tolerance for broccoli:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Broccoli do well in moderate cold which tells us that you can get them planted earlier than other frost tender plants.

The earliest that you can plant broccoli in Vallejo is January. However, you really should wait until February if you don't want to take any chances.

The last month that you can plant broccoli and expect a good harvest is probably October. You probably don't want to wait any later than that or else your broccoli may not have a chance to really do well. You can get started a few weeks earlier by starting your broccoli indoors.

Last Frost Date

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

Just be sure to remember that the actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Vallejo and it can change quite a bit from year to year. Half of the time in Vallejo you get surprised by a frost after February 15 so make sure that you are prepared to protect your broccoli if you have a late frost.

USDA Zone Info for Vallejo

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 Vallejo

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