When can I plant Dallas Fern in Zone 4b

One of the best tools that we have as gardeners to help us figure out our 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 our area.

The USDA zone info for Zone 4b should be looked at to determine when to plant dallas fern.


Planting Calendar for Dallas Fern

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

It's probably a bad idea to plant dallas fern until after all chance of frost has passed because they are not cold tolerant.

JanFebMarAprMayJunJulAugSepOctNovDec
Legend 
A good time to plant dallas fern
Possibly ok, but a risky time to plant dallas fern
Probably not a good time to plant dallas fern

The earliest that you can plant dallas fern in Zone 4b is May. However, you really should wait until June if you don't want to take any chances.

The last month that you can plant dallas fern and expect a good harvest is probably August. If you wait any later than that and your dallas fern may not have a chance to grow to maturity. You can get started a few weeks earlier by starting your dallas fern indoors.

Last Frost Date

The average date of last frost is May 15 in Zone 4b. We can expect an average low temperature of -25°F in the coldest months of winter.

Since the USDA zone info for Zone 4b is an average our actual date of last frost can change quite a bit from year to year. Half of the time in Zone 4b we get a frost after May 15 so make sure that you are prepared to protect your dallas fern in the event of one of those late frosts.

USDA Zone Info for Zone 4b

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)May 15
Average Date of First Frost (fall)September 15
Lowest Expected Low-25°F
Highest Expected Low-20°F

This means that on a really cold year, the coldest it will get is -25°F. On most years you should be prepared to experience lows near -20°F.

Plants to Grow in Zone 4b

You may be interested in our other planting guides for Zone 4b.