When can I plant Lithospermum in Zone 2b

One of the first steps we take when we are determining our gardening schedule is find our USDA Zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for our area.

The USDA zone info for Zone 2b can be reviewed to figure out when it's possible to plant lithospermum.


Planting Calendar for Lithospermum

Frost tolerance for lithospermum: Not tolerant of frost.
When you should plant them: After the last frost when the weather gets warmer.

Lithospermum do not do well in cold weather which means that it's important to wait until it warms up after the last frost has passed before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant lithospermum
Possibly ok, but a risky time to plant lithospermum
Probably not a good time to plant lithospermum

The earliest that you can plant lithospermum in Zone 2b is May. However, you really should wait until June 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. Any later than that and your lithospermum may not have a chance to really do well. Starting your lithospermum indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Zone 2b the average date of last frost happens on May 15. In the coldest months of winter we can expect an average low temperature of -45°F.

Since the USDA zone info for Zone 2b is not always accurate our actual date of last frost will vary from year to year. Half of the time in Zone 2b we get a frost after May 15 so make sure that you are prepared to protect your lithospermum if we have one of those late frosts.

USDA Zone Info for Zone 2b

Here is the info for USDA Zone 2b.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)August 15
Lowest Expected Low-45°F
Highest Expected Low-40°F

This means that on a really cold year, the coldest it will get is -45°F. On most years you should be prepared to experience lows near -40°F.

Plants to Grow in Zone 2b

You may be interested in our other planting guides for Zone 2b.