One of the first steps you take when you are getting a good idea your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

The earliest that you can plant lithospermum in Erie should be estimated by using the USDA zone info.

Planting Calendar for Lithospermum

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

Lithospermum require warm weather which means that it's important to wait until it warms up after the last frost has passed before you can plant them.

The earliest that you can plant lithospermum in Erie 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 fully mature. You can get started a couple of weeks earlier by starting your lithospermum indoors.

Last Frost Date

On average the last frost has passed is on April 15 in Erie. It might get as low as -15°F during the coldest months of winter.

Since the USDA zone info for Erie is not always accurate the actual date of last frost changes from year to year. Since half of the time in Erie last frost occurs after April 15 be ready to protect your lithospermum in the event of a surprise late frost.

USDA Zone Info for Erie

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Erie

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