One of the first steps you take when you are estimating your gardening schedule is find your 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 getting a good idea when to plant kale is to consult the USDA zone info for San Bruno.

Planting Calendar for Kale

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

Kale do well in moderate cold which tells us that you can start planting them earlier than other frost tender plants.

The earliest that you can plant kale in San Bruno 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 kale and expect a good harvest is probably October. If you wait any later than that and your kale may not have a chance to grow to maturity. You can get started a little bit earlier by starting your kale indoors.

Last Frost Date

On average the last frost has passed is on January 31 in San Bruno. It might get as low as 30°F during the coldest months of winter.

Just be sure to remember that USDA zone info for San Bruno is not always accurate and the actual date of last frost changes from year to year. Half of the time in San Bruno last frost occurs after January 31 so just be sure to be ready to protect your kale if you have a surprise late frost.

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.