One of the first steps you take when you are determining 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.

You will be able to estimate when it's a good idea to plant snow-in summer by reviewing the USDA zone info for Millbrae.

Planting Calendar for Snow-in Summer

Frost tolerance for snow-in summer:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since snow-in summer are one of those plants that can tolerate a little bit of cold weather you can plant them just a bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant snow-in summer in Millbrae 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 snow-in summer and expect a good harvest is probably October. Any later than that and your snow-in summer may not have a chance to fully mature. If you are starting your snow-in summer indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost has passed is on January 31 in Millbrae. In the coldest months of winter you can expect an average low temperature of 30°F.

Since the USDA zone info for Millbrae may not be accurate from year to year the actual date of last frost is different every year. Half of the time in Millbrae there is a last frost after January 31 so just be sure to be ready to cover your snow-in summer if you have a surprise late frost.

USDA Zone Info for Millbrae

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 Millbrae

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