Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

It's a good idea to figure out when you can plant cardinal flower by using the USDA zone info for Carlisle.

Planting Calendar for Cardinal Flower

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

Since cardinal flower require warm weather you must wait until after the last frost has passed before you can plant them.

The earliest that you can plant cardinal flower in Carlisle 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. Any later than that and your cardinal flower may not have a chance to really do well. Starting your cardinal flower indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Carlisle the average date of last frost happens on April 15. It might get as low as -5°F during the coldest months of winter.

Since the USDA zone info for Carlisle is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Carlisle last frost occurs after April 15 so just be sure to be ready to cover your cardinal flower if you have a surprise late frost.

USDA Zone Info for Carlisle

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 Carlisle

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