One of the first steps you take when you are getting a good idea your gardening schedule is find your 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.

In Marathon you can estimate when to plant sweet potatos by reviewing the USDA zone info.

Planting Calendar for Sweet Potatos

Frost tolerance for sweet potatos:	Not tolerant of frost.
When to plant:	After all chance of frost has passed.

Since sweet potatos do not do well in cold weather you need to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant sweet potatos 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 sweet potatos and expect a good harvest is probably November. If you wait any later than that and your sweet potatos may not have a chance to grow to maturity. You can get started a little bit earlier by starting your sweet potatos indoors.

Last Frost Date

In Marathon it never frosts. You can expect an average low temperature of 45°F in the coldest months of winter.

Always keep in mind that the actual date of last frost is an average because it is based on the USDA zone info for Marathon and it will vary from year to year. Since it never frosts in Marathon you do not have to be ready to cover your sweet potatos if you have one of those late frosts.

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.