The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The first opportunity to plant lithospermum in Lake Forest should be figured out by reviewing the USDA zone info.

Planting Calendar for Lithospermum

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

It's not a good idea to plant lithospermum until after the last frost because they are not cold tolerant.

The earliest that you can plant lithospermum in Lake Forest 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 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 fully mature. You can get started a few weeks earlier by starting your lithospermum indoors.

Last Frost Date

On average all chance of frost has passed is on January 31 in Lake Forest. In the coldest months of winter you should expect an average low temperature of 30°F.

Remember that USDA zone info for Lake Forest may not be accurate from year to year and the actual date of last frost will vary from year to year. Since half of the time in Lake Forest there is a last frost after January 31 be ready to cover your lithospermum in the event of a late frost.

USDA Zone Info for Lake Forest

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 Lake Forest

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