The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

By looking at the USDA zone info for San Rafael it's a good idea to figure out when it's a good idea to plant bleeding hearts.

Planting Calendar for Bleeding Hearts

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

Since bleeding hearts 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 bleeding hearts in San Rafael 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 bleeding hearts and expect a good harvest is probably September. Any later than that and your bleeding hearts may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your bleeding hearts indoors.

Last Frost Date

On average the last frost is on January 31 in San Rafael. In the coldest months of winter you can expect an average low temperature of 30°F.

Keep in mind that USDA zone info for San Rafael is just an average and the actual date of last frost changes from year to year. Since half of the time in San Rafael it frosts late in the year after January 31 be ready to cover your bleeding hearts in the event of a surprise late frost.

USDA Zone Info for San Rafael

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in San Rafael

You may be interested in your other planting guides for San Rafael.