One of the best tools that you have as gardeners to help us determine your gardening schedule is the USDA zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

In Slatington you can figure out when you can plant cardinal flower by looking at the USDA zone info.

Planting Calendar for Cardinal Flower

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

You really shouldn't plant cardinal flower until after the last frost when the weather gets warmer because they are not cold tolerant.

The earliest that you can plant cardinal flower in Slatington is April. However, you really should wait until May 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 August. If you wait any later than that and your cardinal flower may not have a chance to really do well. You can get started a couple of weeks earlier by starting your cardinal flower indoors.

Last Frost Date

On average all chance of frost has passed is on April 15 in Slatington. It might get as low as -5°F during the coldest months of winter.

Remember that the actual date of last frost is not always accurate because it is based on the USDA zone info for Slatington and it will vary from year to year. Half of the time in Slatington you get a frost after April 15 so make sure that you are prepared to protect your cardinal flower in the event of a surprise late frost.

USDA Zone Info for Slatington

Here is the info for USDA Zone 6b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-5°F
Highest Expected Low	0°F

This means that on a really cold year, the coldest it will get is -5°F. On most years you should be prepared to experience lows near 0°F.

Plants to Grow in Slatington

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