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.

One way of determining when to plant lithospermum is to look at the USDA zone info for Collingswood.

Planting Calendar for Lithospermum

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

You can not plant lithospermum until after the last frost because they are not cold tolerant.

The earliest that you can plant lithospermum in Collingswood 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. 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

The average date of last frost is April 15 in Collingswood. You should expect an average low temperature of 0°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Collingswood 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 Collingswood you get a frost after April 15 be ready to cover your lithospermum if you have one of those late frosts.

USDA Zone Info for Collingswood

Here is the info for USDA Zone 7a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	0°F
Highest Expected Low	5°F

This means that on a really cold year, the coldest it will get is 0°F. On most years you should be prepared to experience lows near 5°F.

Plants to Grow in Collingswood

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