The USDA Zone info is a great tool for gardeners to help us determine your gardening schedule. The zone info helps tell us things like average date of last frost and lowest expected temperature for your area.

A common way of determining when to plant welsh onion is to refer to the USDA zone info for Sebastian.

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 plants that are more sensitive to the cold.

The earliest that you can plant welsh onion in Sebastian is February. However, you really should wait until March 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 September. Any later than that and your welsh onion may not have a chance to really do well. You can get started a little bit earlier by starting your welsh onion indoors.

Last Frost Date

The average date of last frost is January 31 in Sebastian. It might get as low as 30°F during the coldest months of winter.

Just be sure to remember that USDA zone info for Sebastian is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Sebastian it frosts late in the year after January 31 so be sure to be ready to cover your welsh onion if you have one of those late frosts.

USDA Zone Info for Sebastian

Here is the info for USDA Zone 10a.

Average Date of Last Frost (spring)	January 31
Average Date of First Frost (fall)	December 15
Lowest Expected Low	30°F
Highest Expected Low	35°F

This means that on a really cold year, the coldest it will get is 30°F. On most years you should be prepared to experience lows near 35°F.

Plants to Grow in Sebastian

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