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.

By reviewing the USDA zone info for Sherman you should be able to figure out when you can plant skullcap.

Planting Calendar for Skullcap

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

It's a bad idea to plant skullcap until after the last frost when the weather gets warmer because they do not do well in cold weather.

The earliest that you can plant skullcap in Sherman 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 skullcap and expect a good harvest is probably August. Any later than that and your skullcap may not have a chance to grow to maturity. If you are starting your skullcap 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 March 15 in Sherman. You can expect an average low temperature of 10°F in the coldest months of winter.

Remember that USDA zone info for Sherman is just an average and the actual date of last frost can change quite a bit from year to year. Since half of the time in Sherman you get surprised by a frost after March 15 be ready to protect your skullcap in the event of a surprise late frost.

USDA Zone Info for Sherman

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Sherman

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