Will Frost kill my onions?

This is how cold can onions withstand?

Although onions are hardy plants, they can tolerate temperatures as low as 20 degrees F. You will need to protect them against a hard freeze.

You may also wonder if you can plant onions before the last frost. Onions can thrive in temperatures between 50 and 75, but they are also quite hardy in colder climates. This cool-weather crop can withstand temperatures as low as 20F. To produce large bulbs, onions require a long growing season. It is important to plant early and mulch well to prevent the bulb freezing (and rotting once it thawed).

Afterwards, one might also wonder, "Do I need to cover onions for freezing?"

Frost Protection Onions usually survive one to two frosts if they are kept warm. You can increase their survival chances by covering the soil with at least 2 inches of straw or leaves, or grass clippings. Similar protection can be provided by blankets, bed sheets, and floating row covers.

Can arugula withstand frost?

Arugula likes cool weather and is frost-hardy enough to withstand winter in a cold greenhouse or cold frame. The arugula is a long-leaved open lettuce. It can also be intercropped with other longer-season plants.