When can I plant Pennisetum in Zone 5b

One of the best tools that we have as gardeners to help us estimate 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 best time to plant pennisetum in Zone 5b should be figured out by reviewing the USDA zone info.


Planting Calendar for Pennisetum

Frost tolerance for pennisetum: Tolerant of a very small amount of frost.
When you should plant them: Up to 3 weeks before last frost.

You can plant pennisetum slightly earlier in the year because they are one of those plants that can tolerate a tiny bit of cold weather.

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

The earliest that you can plant pennisetum in Zone 5b is March. However, you really should wait until April if you don't want to take any chances.

The last month that you can plant pennisetum and expect a good harvest is probably August. You probably don't want to wait any later than that or else your pennisetum may not have a chance to fully mature. Starting your pennisetum indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

Keep in mind that USDA zone info for Zone 5b is not always accurate and our actual date of last frost can change quite a bit from year to year. Half of the time in Zone 5b we get surprised by a frost after April 15 so make sure that you are prepared to cover your pennisetum if we have a surprise late frost.

USDA Zone Info for Zone 5b

Here is the info for USDA Zone 5b.

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

This means that on a really cold year, the coldest it will get is -15°F. On most years you should be prepared to experience lows near -10°F.

Plants to Grow in Zone 5b

You may be interested in our other planting guides for Zone 5b.