Before planting it is a good idea to find your USDA Zone info to figure out your garden schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

It's a good idea to determine when it's a good idea to plant welsh onion by referring to the USDA zone info for Marathon.

Planting Calendar for Welsh onion

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

Since welsh onion do ok in moderate cold you can plant them slightly earlier in the year than other frost tender plants.

The earliest that you can plant welsh onion 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 welsh onion and expect a good harvest is probably November. If you wait any later than that and your welsh onion may not have a chance to really do well. Starting your welsh onion indoors is a great way to get them started a little bit earlier.

Last Frost Date

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

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