One of the best tools that you have as gardeners to help us figure out 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.

One way of making a decision about when to plant garden mums is to look at the USDA zone info for Worthington.

Planting Calendar for Garden Mums

Frost tolerance for garden mums:	Tolerant of some frost.
When to plant:	Up to 5 weeks before last frost.

Since garden mums are moderately cold tolerant you can plant them a little bit earlier in the year than other frost tender plants.

The earliest that you can plant garden mums in Worthington 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 garden mums and expect a good harvest is probably August. If you wait any later than that and your garden mums may not have a chance to really do well. Starting your garden mums indoors is a great way to get them started a few weeks earlier.

Last Frost Date

In Worthington the average date of last frost happens on May 15. It might get as low as -25°F during the coldest months of winter.

Since the USDA zone info for Worthington is just an average the actual date of last frost can change quite a bit from year to year. Since half of the time in Worthington there is a last frost after May 15 be ready to cover your garden mums if you have a late frost.

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.