One of the best tools that you have as gardeners to help us estimate your gardening schedule is the USDA zone info. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The best time to plant pennisetum in Worthington should be determined by reviewing the USDA zone info.

Planting Calendar for Pennisetum

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

Pennisetum can survive in some cold which tells us that you can plant them slightly earlier in the year than other frost tender plants.

The earliest that you can plant pennisetum in Worthington 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 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 grow to maturity. If you are starting your pennisetum indoors then you might be able to get away with starting them a little bit earlier.

Last Frost Date

On average the last frost is on May 15 in Worthington. It might get as low as -25°F during the coldest months of winter.

Remember that USDA zone info for Worthington may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Half of the time in Worthington it frosts late in the year after May 15 so always be ready to protect your pennisetum if you have one of those late frosts.

USDA Zone Info for Worthington

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 Worthington

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