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

In Morton you can determine when to plant asparagus by using the USDA zone info.

Planting Calendar for Asparagus

Frost tolerance for asparagus:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Since asparagus are very cold tolerant you can plant them earlier in the year than other plants that might not handle the cold.

The earliest that you can plant asparagus in Morton is February. However, you really should wait until March if you don't want to take any chances.

The last month that you can plant asparagus and expect a good harvest is probably September. If you wait any later than that and your asparagus may not have a chance to fully mature. You can get started a couple of weeks earlier by starting your asparagus indoors.

Last Frost Date

The average date of last frost is April 15 in Morton. In the coldest months of winter you should expect an average low temperature of -15°F.

Since the USDA zone info for Morton is an average the actual date of last frost can change quite a bit from year to year. Half of the time in Morton it frosts late in the year after April 15 so just be sure to be ready to cover your asparagus if you have a late frost.

USDA Zone Info for Morton

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 Morton

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