One of the first steps you take when you are figuring out 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.

By looking at the USDA zone info for Sunnyvale it's possible to determine when it's the best time to plant brussels sprouts.

Planting Calendar for Brussels Sprouts

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

Since brussels sprouts are moderately cold tolerant you can plant them just a bit earlier in the year than other frost tender plants.

The earliest that you can plant brussels sprouts in Sunnyvale 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 brussels sprouts and expect a good harvest is probably October. If you wait any later than that and your brussels sprouts may not have a chance to fully mature. You can get started a little bit earlier by starting your brussels sprouts indoors.

Last Frost Date

The average date of last frost is February 15 in Sunnyvale. You should expect an average low temperature of 25°F in the coldest months of winter.

Remember that USDA zone info for Sunnyvale is not always accurate and the actual date of last frost can change quite a bit from year to year. Since half of the time in Sunnyvale you get surprised by a frost after February 15 be ready to protect your brussels sprouts if you have one of those late frosts.

USDA Zone Info for Sunnyvale

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 Sunnyvale

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