One of the best tools that you have as gardeners to help us determine 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.

The best time to plant blue throatwort in Corte Madera can be determined by referring to the USDA zone info.

Planting Calendar for Blue Throatwort

Frost tolerance for blue throatwort:	Not tolerant of frost.
When to plant:	After the last frost has passed.

Since blue throatwort are not cold tolerant you need to wait until after the last frost before you can plant them.

The earliest that you can plant blue throatwort in Corte Madera 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 blue throatwort and expect a good harvest is probably September. Any later than that and your blue throatwort may not have a chance to fully mature. You can get started a few weeks earlier by starting your blue throatwort indoors.

Last Frost Date

The average date of last frost is January 31 in Corte Madera. You should expect an average low temperature of 30°F in the coldest months of winter.

It's important to remember that USDA zone info for Corte Madera is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Corte Madera there is a last frost after January 31 so make sure that you are ready to cover your blue throatwort in the event of one of those late frosts.

USDA Zone Info for Corte Madera

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 Corte Madera

You may be interested in your other planting guides for Corte Madera.