The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

A way of figuring out when you can plant spinach is to refer to the USDA zone info for Worthington.

Planting Calendar for Spinach

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

Spinach do ok in a little bit of cold which means that you can plant them a bit earlier in the year than more sensitive plants.

The earliest that you can plant spinach 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 spinach and expect a good harvest is probably August. You probably don't want to wait any later than that or else your spinach may not have a chance to fully mature. If you are starting your spinach indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

On average the last frost when the weather gets warmer is on May 15 in Worthington. In the coldest months of winter you can expect an average low temperature of -25°F.

Keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Worthington and it can change quite a bit from year to year. Since half of the time in Worthington it frosts late in the year after May 15 be ready to protect your spinach 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.