Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

One way of figuring out when it's possible to plant regal geranium is to consult the USDA zone info for Walnut Creek.

Planting Calendar for Regal Geranium

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

Since regal geranium are barely cold tolerant you can plant them a bit earlier in the year than plants that are more sensitive to the cold.

The earliest that you can plant regal geranium in Walnut Creek 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 regal geranium and expect a good harvest is probably September. If you wait any later than that and your regal geranium may not have a chance to really do well. You can get started a few weeks earlier by starting your regal geranium indoors.

Last Frost Date

On average all chance of frost has passed is on February 15 in Walnut Creek. You should expect an average low temperature of 25°F in the coldest months of winter.

Always keep in mind that USDA zone info for Walnut Creek may not be accurate from year to year and the actual date of last frost is different every year. Half of the time in Walnut Creek last frost occurs after February 15 so just be sure to be ready to cover your regal geranium if you have one of those late frosts.

USDA Zone Info for Walnut Creek

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 Walnut Creek

You may be interested in your other planting guides for Walnut Creek.