One of the first steps you take when you are estimating 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.

The earliest that you can plant cuphea in San Bernardino should be figured out by checking out the USDA zone info.

Planting Calendar for Cuphea

Frost tolerance for cuphea:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

You really shouldn't plant cuphea until after all chance of frost has passed because they require warm weather.

The earliest that you can plant cuphea 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 cuphea and expect a good harvest is probably September. You probably don't want to wait any later than that or else your cuphea may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your cuphea indoors.

Last Frost Date

The average date of last frost is February 15 in San Bernardino. You should expect an average low temperature of 25°F in the coldest months of winter.

Since the USDA zone info for San Bernardino is not always accurate the actual date of last frost will vary from year to year. Half of the time in San Bernardino there is a last frost after February 15 so make sure that you are prepared to cover your cuphea in the event of 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.