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

A common way of estimating when it's the best time to plant asparagus fern is to refer to the USDA zone info for Marathon.

Planting Calendar for Asparagus Fern

Frost tolerance for asparagus fern:	Not tolerant of frost.
When to plant:	After the last frost has passed.

It's not a good idea to plant asparagus fern until after the last frost because they do not do well in cold weather.

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

The last month that you can plant asparagus fern and expect a good harvest is probably November. Any later than that and your asparagus fern may not have a chance to really do well. If you are starting your asparagus fern indoors then you might be able to get away with starting them a couple of weeks earlier.

Last Frost Date

In Marathon it never frosts. It might get as low as 45°F during the coldest months of winter.

Since the USDA zone info for Marathon may not be accurate from year to year the actual date of last frost can change quite a bit from year to year. Since it never frosts in Marathon you do not have to be ready to protect your asparagus fern if you have a surprise late frost.

USDA Zone Info for Marathon

Here is the info for USDA Zone 11b.

Average Date of Last Frost (spring)	Never
Average Date of First Frost (fall)	Never
Lowest Expected Low	45°F
Highest Expected Low	50°F

This means that on a really cold year, the coldest it will get is 45°F. On most years you should be prepared to experience lows near 50°F.

Plants to Grow in Marathon

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