The USDA Zone info is a great tool for gardeners to help us estimate 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 Jordan can be used to determine when it's a good idea to plant onions.

Planting Calendar for Onions

Frost tolerance for onions:	Very tolerant of frost.
When to plant:	Up to 7 weeks before last frost.

Onions do well in a bit of cold which means that you can plant them earlier in the year than more sensitive plants.

The earliest that you can plant onions in Jordan 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 onions and expect a good harvest is probably August. If you wait any later than that and your onions may not have a chance to really do well. Starting your onions indoors is a great way to get them started a few weeks earlier.

Last Frost Date

The average date of last frost is May 15 in Jordan. In the coldest months of winter you should expect an average low temperature of -25°F.

It's important to remember that USDA zone info for Jordan is just an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Jordan you get a frost after May 15 so always be ready to cover your onions in the event of a surprise late frost.

USDA Zone Info for Jordan

Here is the info for USDA Zone 4b.

Average Date of Last Frost (spring)	May 15
Average Date of First Frost (fall)	September 15
Lowest Expected Low	-25°F
Highest Expected Low	-20°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 -20°F.

Plants to Grow in Jordan

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