One of the best tools that you have as gardeners to help us determine your gardening schedule is the 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.

You can determine when it's possible to plant spearmint in Livermore by referring to the USDA zone info.

Planting Calendar for Spearmint

Frost tolerance for spearmint:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Spearmint can survive in a bit of cold which means that you can plant them quite a bit earlier in the year than other frost tender plants.

The earliest that you can plant spearmint in Livermore 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 spearmint and expect a good harvest is probably October. If you wait any later than that and your spearmint may not have a chance to grow to maturity. Starting your spearmint indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

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

Since the USDA zone info for Livermore may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Livermore last frost occurs after February 15 so make sure that you are ready to cover your spearmint in the event of a surprise late frost.

USDA Zone Info for Livermore

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 Livermore

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