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.

A way of determining when you can plant lithospermum is to refer to the USDA zone info for Lake Jackson.

Planting Calendar for Lithospermum

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

Since lithospermum are not cold tolerant it's necessary to wait until after the last frost has passed before you can plant them.

The earliest that you can plant lithospermum in Lake Jackson is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant lithospermum and expect a good harvest is probably September. If you wait any later than that and your lithospermum may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your lithospermum indoors.

Last Frost Date

The average date of last frost is February 15 in Lake Jackson. You can expect an average low temperature of 20°F in the coldest months of winter.

Keep in mind that USDA zone info for Lake Jackson may not be accurate from year to year and the actual date of last frost changes from year to year. Half of the time in Lake Jackson there is a last frost after February 15 so just be sure to be ready to protect your lithospermum if you have a surprise late frost.

USDA Zone Info for Lake Jackson

Here is the info for USDA Zone 9a.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	20°F
Highest Expected Low	25°F

This means that on a really cold year, the coldest it will get is 20°F. On most years you should be prepared to experience lows near 25°F.

Plants to Grow in Lake Jackson

You may be interested in your other planting guides for Lake Jackson.