Growing Onions at Home

DC Greens staffer, Tasha Smith, shares tips for growing onions in your home garden.

Onions freshly harvested laid out on a table at The Well at Oxon Run, DC Greens' community farm.

Did you know that November is the perfect time to plant onions? That’s right! 

Whether you’re a seasoned gardener or just starting out, now is the perfect moment to sow those flavorful bulbs. Onions are not just a kitchen staple. They’re also super easy to grow!

Why Plant Onions

Here’s why you should plant onions in your home garden:

  1. Onions thrive in cooler weather. Many of us associate warmer weather with gardening, but onions are a bulb that need the “cold snap” of fall and winter to help them flourish.
  2. Homegrown onions taste incredible. Have you ever tasted a homegrown onion? The flavor is out of this world! You can’t get onions fresher than the ones you grow right at home.
  3. They’re packed with nutrients. Onions are full of great vitamins and minerals that nourish the body, like Vitamin C, B vitamins, potassium, iron, and more!
How To Plant Onions

Ready to get planting? Here are some tips to get you started. First, make sure to choose a sunny spot so they get lots of light. Also, you’ll want to keep the soil well-drained, so try to find a planting spot that has good drainage, like a slope or higher ground. And of course, water them regularly.

Freshly harvested onions sitting atop soil
When To Harvest

Onions are ready to harvest when the neck of the onion flops over, the leaves turn brown, and the onion stops growing. 

  • Neck flops over: The neck of the onion is where the leaves meet the bulb. When the neck flops over, it’s no longer receiving nutrients from the plant and is ready to cure. 
  • Leaves turn brown: The leaves of the onion will turn brown and have a papery consistency. 
  • Onion stops growing: The onion will stop growing and the stalks will start to fall over. 

Onions grown from seed typically take 90–100 days to mature, while onions grown from sets are usually ready to harvest after about 80 days. 

Happy gardening!