The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. 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 cardinal flower in Arnold can be determined 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 has passed.

You can not plant cardinal flower until after the last frost has passed because they require warm weather.

The earliest that you can plant cardinal flower in Arnold 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

The average date of last frost is April 15 in Arnold. It might get as low as -10°F during the coldest months of winter.

Since the USDA zone info for Arnold is just an average the actual date of last frost will vary from year to year. Since half of the time in Arnold last frost occurs after April 15 be ready to protect your cardinal flower in the event of a late frost.

USDA Zone Info for Arnold

Here is the info for USDA Zone 6a.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-10°F
Highest Expected Low	-5°F

This means that on a really cold year, the coldest it will get is -10°F. On most years you should be prepared to experience lows near -5°F.

Plants to Grow in Arnold

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