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

By referring to the USDA zone info for Marathon you should be able to estimate when it's possible to plant alstromeria.

Planting Calendar for Alstromeria

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

Alstromeria do ok in moderate cold which tells us that you can plant them just a bit earlier in the year than plants that are more sensitive to the cold.

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

Last Frost Date

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

Remember that the actual date of last frost is an average because it is based on the USDA zone info for Marathon and it changes from year to year. Since it never frosts in Marathon you do not have to be ready to protect your alstromeria 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.