The USDA Zone info is a great tool for gardeners to help us determine 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.

It's possible to figure out when it's possible to plant welsh onion by referring to the USDA zone info for Lebanon.

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 well in very little cold which tells us that you can plant them a bit earlier in the year than other frost tender plants.

The earliest that you can plant welsh onion in Lebanon 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. You probably don't want to wait any later than that or else your welsh onion may not have a chance to grow to maturity. You can get started a couple of weeks earlier by starting your welsh onion indoors.

Last Frost Date

The average date of last frost is April 15 in Lebanon. In the coldest months of winter you should expect an average low temperature of -15°F.

Always keep in mind that USDA zone info for Lebanon may not be accurate from year to year and the actual date of last frost can change quite a bit from year to year. Since half of the time in Lebanon you get a frost after April 15 be ready to protect your welsh onion in the event of one of those late frosts.

USDA Zone Info for Lebanon

Here is the info for USDA Zone 5b.

Average Date of Last Frost (spring)	April 15
Average Date of First Frost (fall)	October 15
Lowest Expected Low	-15°F
Highest Expected Low	-10°F

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

Plants to Grow in Lebanon

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