Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

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

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 tells us that you have to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant lithospermum in Valparaiso 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 grow to maturity. Starting your lithospermum indoors is a great way to get them started a little bit earlier.

Last Frost Date

In Valparaiso the average date of last frost happens on March 15. It might get as low as 15°F during the coldest months of winter.

Since the USDA zone info for Valparaiso is just an average the actual date of last frost will vary from year to year. Half of the time in Valparaiso last frost occurs after March 15 so make sure that you are prepared to protect your lithospermum in the event of a surprise late frost.

USDA Zone Info for Valparaiso

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°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 20°F.

Plants to Grow in Valparaiso

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