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

You can determine when to plant helianthemum in San Juan Capistrano by looking at the USDA zone info.

Planting Calendar for Helianthemum

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

You can plant helianthemum a little bit earlier in the year because they do well in moderate cold.

The earliest that you can plant helianthemum in San Juan Capistrano 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 helianthemum and expect a good harvest is probably October. If you wait any later than that and your helianthemum may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your helianthemum indoors.

Last Frost Date

The average date of last frost is January 31 in San Juan Capistrano. You should expect an average low temperature of 30°F in the coldest months of winter.

Since the USDA zone info for San Juan Capistrano is an average the actual date of last frost changes from year to year. Since half of the time in San Juan Capistrano you get surprised by a frost after January 31 be ready to cover your helianthemum in the event of a late frost.

USDA Zone Info for San Juan Capistrano

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 Juan Capistrano

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