The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A common way of estimating when it's possible to plant monkey flower is to consult the USDA zone info for South San Francisco.

Planting Calendar for Monkey Flower

Frost tolerance for monkey flower:	Not tolerant of frost.
When to plant:	After the last frost.

Since monkey flower require warm weather it is important to wait until after the last frost has passed before you can plant them.

The earliest that you can plant monkey flower in South San Francisco is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant monkey flower and expect a good harvest is probably September. If you wait any later than that and your monkey flower may not have a chance to really do well. You can get started a couple of weeks earlier by starting your monkey flower indoors.

Last Frost Date

On average all chance of frost has passed is on January 31 in South San Francisco. In the coldest months of winter you can expect an average low temperature of 30°F.

Always keep in mind that USDA zone info for South San Francisco is an average and the actual date of last frost is different every year. Half of the time in South San Francisco it frosts late in the year after January 31 so make sure that you are ready to cover your monkey flower in the event of a late frost.

USDA Zone Info for South San Francisco

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 South San Francisco

You may be interested in your other planting guides for South San Francisco.