The USDA Zone info is a great tool for gardeners to help us figure out your gardening schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

The USDA zone info for Miami can be read to determine when to plant welsh onion.

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.

Welsh onion can survive in a tiny bit of cold which tells us that you can plant them just a tiny bit earlier in the year than other frost tender plants.

The earliest that you can plant welsh onion in Miami 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. You probably don't want to wait any later than that or else your welsh onion may not have a chance to really do well. If you are starting your welsh onion indoors then you might be able to get away with starting them a few weeks earlier.

Last Frost Date

In Miami it never frosts. It might get as low as 40°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Miami is an average and the actual date of last frost can change quite a bit from year to year. Since it never frosts in Miami you do not have to be ready to protect your welsh onion if you have a surprise late frost.

USDA Zone Info for Miami

Here is the info for USDA Zone 11a.

Average Date of Last Frost (spring)	Never
Average Date of First Frost (fall)	Never
Lowest Expected Low	40°F
Highest Expected Low	45°F

This means that on a really cold year, the coldest it will get is 40°F. On most years you should be prepared to experience lows near 45°F.

Plants to Grow in Miami

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