The USDA Zone info is a great tool for gardeners to help us estimate your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Healdsburg you can determine when it's the best time to plant mustard greens by referring to the USDA zone info.

Planting Calendar for Mustard greens

Frost tolerance for mustard greens:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since mustard greens do well in moderate cold you can plant them a little bit earlier in the year than more sensitive plants.

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

The last month that you can plant mustard greens and expect a good harvest is probably October. If you wait any later than that and your mustard greens may not have a chance to really do well. Starting your mustard greens indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Healdsburg the average date of last frost happens on February 15. In the coldest months of winter you can 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 is different every year. Half of the time in Healdsburg you get surprised by a frost after February 15 so make sure that you are ready to protect your mustard greens in the event of one of those late frosts.

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.