Before planting it is a good idea to find your USDA Zone info to determine your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

You can estimate when it's the best time to plant blue throatwort in Clearlake 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.

It's probably not a good idea to plant blue throatwort until after the last frost because they require warm weather.

The earliest that you can plant blue throatwort in Clearlake 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. Any later than that and your blue throatwort may not have a chance to grow to maturity. Starting your blue throatwort indoors is a great way to get them started a few weeks earlier.

Last Frost Date

On average the last frost has passed is on March 15 in Clearlake. You should expect an average low temperature of 15°F in the coldest months of winter.

Since the USDA zone info for Clearlake is just an average the actual date of last frost can change quite a bit from year to year. Half of the time in Clearlake last frost occurs after March 15 so just be sure to be ready to protect your blue throatwort if you have one of those late frosts.

USDA Zone Info for Clearlake

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Clearlake

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