One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's possible to figure out when it's the best time to plant lithospermum by checking out the USDA zone info for New Britain.

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 you must wait until after the last frost has passed before you can plant them.

The earliest that you can plant lithospermum in New Britain 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. If you are starting your lithospermum indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

On average all chance of frost has passed is on April 15 in New Britain. In the coldest months of winter you should expect an average low temperature of -10°F.

It's important to remember that USDA zone info for New Britain may not be accurate from year to year and the actual date of last frost will vary from year to year. Half of the time in New Britain you get surprised by a frost after April 15 so be sure to be ready to cover your lithospermum in the event of a late frost.

USDA Zone Info for New Britain

Here is the info for USDA Zone 6a.

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

Plants to Grow in New Britain

You may be interested in your other planting guides for New Britain.