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

You should be able to figure out when it's possible to plant scutellaria by using the USDA zone info for Holtville.

Planting Calendar for Scutellaria

Frost tolerance for scutellaria:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

You really shouldn't plant scutellaria until after the last frost because they do not do well in cold weather.

The earliest that you can plant scutellaria in Holtville 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 scutellaria and expect a good harvest is probably September. Any later than that and your scutellaria may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your scutellaria indoors.

Last Frost Date

In Holtville the average date of last frost happens on January 31. You can expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for Holtville is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Holtville it frosts late in the year after January 31 so just be sure to be ready to protect your scutellaria in the event of a late frost.

USDA Zone Info for Holtville

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 Holtville

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