The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Oakland you can figure out when it's possible to plant blue throatwort by looking at 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.

You can not plant blue throatwort until after the last frost when the weather gets warmer because they require warm weather.

The earliest that you can plant blue throatwort in Oakland is April. However, you really should wait until May 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 August. If you wait any later than that and your blue throatwort may not have a chance to fully mature. Starting your blue throatwort indoors is a great way to get them started a little bit earlier.

Last Frost Date

The average date of last frost is April 15 in Oakland. It might get as low as 5°F during the coldest months of winter.

Since the USDA zone info for Oakland is just an average the actual date of last frost changes from year to year. Half of the time in Oakland you get a frost after April 15 so just be sure to be ready to cover your blue throatwort in the event of a surprise late frost.

USDA Zone Info for Oakland

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Oakland

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