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.

In Denton you can estimate when it's a good idea to plant welsh onion by checking out the USDA zone info.

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 do ok in moderate cold which tells us that you can plant them slightly earlier than other frost tender plants.

The earliest that you can plant welsh onion in Denton is March. However, you really should wait until April 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 August. 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 when the weather gets warmer is on March 15 in Denton. In the coldest months of winter you should expect an average low temperature of 10°F.

Since the USDA zone info for Denton is not always accurate the actual date of last frost can change quite a bit from year to year. Half of the time in Denton last frost occurs after March 15 so make sure that you are prepared to protect your welsh onion in the event of a late frost.

USDA Zone Info for Denton

Here is the info for USDA Zone 8a.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	10°F
Highest Expected Low	15°F

This means that on a really cold year, the coldest it will get is 10°F. On most years you should be prepared to experience lows near 15°F.

Plants to Grow in Denton

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