One of the best tools that you have as gardeners to help us estimate 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 Marathon you can determine when it's the best time to plant platycodon by using the USDA zone info.

Planting Calendar for Platycodon

Frost tolerance for platycodon:	Tolerant of a very small amount of frost.
When to plant:	Up to 3 weeks before last frost.

Platycodon tend to make it in some cold which means that you can plant them a bit earlier in the year than other plants that might not handle the cold.

The earliest that you can plant platycodon 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 platycodon and expect a good harvest is probably November. If you wait any later than that and your platycodon may not have a chance to really do well. You can get started a couple of weeks earlier by starting your platycodon indoors.

Last Frost Date

In Marathon it never frosts. It might get as low as 45°F during 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 is different every year. Since it never frosts in Marathon you do not have to be ready to cover your platycodon if you have a 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.