One of the first steps you take when you are determining 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.

You will be able to figure out when it's possible to plant steirodiscus by using the USDA zone info for Healdsburg.

Planting Calendar for Steirodiscus

Frost tolerance for steirodiscus:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Since steirodiscus do ok in moderate cold you can plant them just a tiny bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant steirodiscus in Healdsburg is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant steirodiscus and expect a good harvest is probably September. If you wait any later than that and your steirodiscus may not have a chance to really do well. You can get started a little bit earlier by starting your steirodiscus indoors.

Last Frost Date

The average date of last frost is February 15 in Healdsburg. In the coldest months of winter you should expect an average low temperature of 25°F.

Since the USDA zone info for Healdsburg may not be accurate from year to year the actual date of last frost will vary from year to year. Half of the time in Healdsburg there is a last frost after February 15 so just be sure to be ready to cover your steirodiscus if you have a surprise late frost.

USDA Zone Info for Healdsburg

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Healdsburg

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