One of the best tools that you have as gardeners to help us estimate your gardening schedule is the 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 determine when it's possible to plant plectranthus by looking at the USDA zone info for Mill Valley.

Planting Calendar for Plectranthus

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

It's probably not a good idea to plant plectranthus until after all chance of frost has passed because they require warm weather.

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

Last Frost Date

The average date of last frost is January 31 in Mill Valley. In the coldest months of winter you can expect an average low temperature of 30°F.

Just be sure to remember that USDA zone info for Mill Valley is just an average and the actual date of last frost is different every year. Since half of the time in Mill Valley there is a last frost after January 31 be ready to protect your plectranthus if you have a surprise late frost.

USDA Zone Info for Mill Valley

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 Mill Valley

You may be interested in your other planting guides for Mill Valley.