One of the first steps you take when you are making a decision about your gardening schedule is find your USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In San Bernardino you can determine when it's the best time to plant mecardonia by using the USDA zone info.

Planting Calendar for Mecardonia

Frost tolerance for mecardonia:	Not tolerant of frost.
When to plant:	After the last frost.

Mecardonia require warm weather which tells us that you need to wait until it warms up after the last frost when the weather gets warmer before you can plant them.

The earliest that you can plant mecardonia in San Bernardino is March. However, you really should wait until April if you don't want to take any chances.

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

Last Frost Date

On average the last frost has passed is on February 15 in San Bernardino. It might get as low as 25°F during the coldest months of winter.

Keep in mind that USDA zone info for San Bernardino is not always accurate and the actual date of last frost is different every year. Half of the time in San Bernardino last frost occurs after February 15 so be sure to be ready to cover your mecardonia if you have a late frost.

USDA Zone Info for San Bernardino

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 San Bernardino

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