One of the first steps you take when you are determining your gardening schedule is find your 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.

It's possible to estimate when it's possible to plant welsh onion by checking out the USDA zone info for Gilbert.

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 are barely cold tolerant which tells us that you can plant them slightly earlier than other frost tender plants.

The earliest that you can plant welsh onion in Gilbert 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 grow to maturity. Starting your welsh onion indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

On average the last frost is on February 15 in Gilbert. You can expect an average low temperature of 25°F in the coldest months of winter.

Always keep in mind that USDA zone info for Gilbert is just an average and the actual date of last frost is different every year. Half of the time in Gilbert last frost occurs after February 15 so be sure to be ready to cover your welsh onion if you have one of those late frosts.

USDA Zone Info for Gilbert

Here is the info for USDA Zone 9b.

Average Date of Last Frost (spring)	February 15
Average Date of First Frost (fall)	December 15
Lowest Expected Low	25°F
Highest Expected Low	30°F

This means that on a really cold year, the coldest it will get is 25°F. On most years you should be prepared to experience lows near 30°F.

Plants to Grow in Gilbert

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