Since onions grow below the soil, it's tricky to know the right time to pull them up. Luckily, there'll be signs in the green ...

A person holding freshly harvested onions - Compassionate Eye Foundation/natasha Alipour Faridani/Getty Images ...

Onions are ready for harvest about two-and-a-half to four months after planting. You'll know they're ready when their leaves ...

The best way to store whole onions is in a cool, dark, dry place, where they can last up to two months.