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.

You can estimate when it's possible to plant lithospermum in Prineville by looking at the USDA zone info.

Planting Calendar for Lithospermum

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

It's not a good idea to plant lithospermum until after the last frost because they are not cold tolerant.

The earliest that you can plant lithospermum in Prineville 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. Any later than that and your lithospermum may not have a chance to really do well. You can get started a couple of weeks earlier by starting your lithospermum indoors.

Last Frost Date

On average the last frost when the weather gets warmer is on April 15 in Prineville. You can expect an average low temperature of -5°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Prineville may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Prineville there is a last frost after April 15 so make sure that you are ready to cover your lithospermum in the event of one of those late frosts.

USDA Zone Info for Prineville

Here is the info for USDA Zone 6b.

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

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

Plants to Grow in Prineville

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