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

The USDA zone info for Yucaipa can be used to determine when to plant cardinal flower.

Planting Calendar for Cardinal Flower

Frost tolerance for cardinal flower:	Not tolerant of frost.
When to plant:	After the last frost when the weather gets warmer.

Since cardinal flower are not cold tolerant it is necessary to wait until after the last frost has passed before you can plant them.

The earliest that you can plant cardinal flower in Yucaipa 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 cardinal flower and expect a good harvest is probably September. You probably don't want to wait any later than that or else your cardinal flower may not have a chance to fully mature. Starting your cardinal flower indoors is a great way to get them started a few weeks earlier.

Last Frost Date

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

Since the USDA zone info for Yucaipa is not always accurate the actual date of last frost changes from year to year. Since half of the time in Yucaipa you get a frost after February 15 be ready to protect your cardinal flower if you have a surprise late frost.

USDA Zone Info for Yucaipa

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 Yucaipa

You may be interested in your other planting guides for Yucaipa.