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.

You will be able to determine when you can plant lithospermum by checking out the USDA zone info for Suwanee.

Planting Calendar for Lithospermum

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

Since lithospermum do not do well in cold weather you need to wait until after the last frost before you can plant them.

The earliest that you can plant lithospermum in Suwanee 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 lithospermum and expect a good harvest is probably August. You probably don't want to wait any later than that or else your lithospermum may not have a chance to grow to maturity. If you are starting your lithospermum 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 April 15 in Suwanee. It might get as low as 5°F during the coldest months of winter.

Since the USDA zone info for Suwanee is not always accurate the actual date of last frost will vary from year to year. Since half of the time in Suwanee there is a last frost after April 15 be ready to protect your lithospermum if you have a late frost.

USDA Zone Info for Suwanee

Here is the info for USDA Zone 7b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	5°F
Highest Expected Low	10°F

This means that on a really cold year, the coldest it will get is 5°F. On most years you should be prepared to experience lows near 10°F.

Plants to Grow in Suwanee

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