When can I plant Cardinal Flower in Zone 1b

One of the first steps we take when we are estimating our gardening schedule is find our USDA Zone info. The zone info helps tell us things like average date of last frost and lowest expected temperature for our area.

The best time to plant cardinal flower in Zone 1b can be estimated by using the USDA zone info.


Planting Calendar for Cardinal Flower

Frost tolerance for cardinal flower: Not tolerant of frost.
When you should plant them: After the last frost has passed.

Cardinal Flower do not do well in cold weather which means that you must wait until it warms up after the last frost has passed before you can plant them.

JanFebMarAprMayJunJulAugSepOctNovDec
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A good time to plant cardinal flower
Possibly ok, but a risky time to plant cardinal flower
Probably not a good time to plant cardinal flower

The earliest that you can plant cardinal flower in Zone 1b is June. However, you really should wait until July 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 July. If you wait any later than that and 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

On average the last frost has passed is on June 15 in Zone 1b. In the coldest months of winter we can expect an average low temperature of -55°F.

Remember that our actual date of last frost may not be accurate from year to year because it is based on the USDA zone info for Zone 1b and it changes from year to year. Since half of the time in Zone 1b there is a last frost after June 15 be ready to cover your cardinal flower if we have one of those late frosts.

USDA Zone Info for Zone 1b

Here is the info for USDA Zone 1b.

Average Date of Last Frost (spring)June 15
Average Date of First Frost (fall)July 15
Lowest Expected Low-55°F
Highest Expected Low-50°F

This means that on a really cold year, the coldest it will get is -55°F. On most years you should be prepared to experience lows near -50°F.

Plants to Grow in Zone 1b

You may be interested in our other planting guides for Zone 1b.