The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The earliest that you can plant cardinal flower in Schuylkill Haven can be estimated by checking out 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.

Cardinal Flower require warm weather which means that it is important to wait until it warms up after the last frost before you can plant them.

The earliest that you can plant cardinal flower in Schuylkill Haven 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. You can get started a little bit earlier by starting your cardinal flower indoors.

Last Frost Date

The average date of last frost is April 15 in Schuylkill Haven. It might get as low as -5°F during the coldest months of winter.

Remember that USDA zone info for Schuylkill Haven is an average and the actual date of last frost will vary from year to year. Half of the time in Schuylkill Haven last frost occurs after April 15 so just be sure to be ready to protect your cardinal flower if you have one of those late frosts.

USDA Zone Info for Schuylkill Haven

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 Schuylkill Haven

You may be interested in your other planting guides for Schuylkill Haven.