Garden How TO

How to Plant Onion Seeds in the Fall

PICK THE RIGHT TYPE OF ONION FOR YOUR CLIMATE

Short-day onions  plant hardiness zones 7, 8, 9, and 10 Neutral/Intermediate-Day Onions are ideal for zones 5 and 6 Long-Day Onions are best to grow for gardeners in zones 6 and cooler

WHEN TO SOW ONION SEEDS IN THE SOUTH

Early fall, around late September through November

WHEN TO SOW ONION SEEDS IN THE NORTH

Option 1: 10 to 12 weeks before the average last frost date of Spring. Option 2: Start in fall but will need to keep plants covered during hard freezing temps.

HOW TO SOW ONION SEEDS 

1. Fill your seed starting tray with pre-moistened seed starting mix.  2. Drop a pinch full of seeds into each cell. Use your fingers to gently press each seed into the mix. 

HOW TO SOW ONION SEEDS 

3. Sprinkle a light layer of seed starting mix on top.  They should be planted ⅛” to ¼” deep. 4. Use a spray bottle to moisten the top of your tray. Avoid pouring water directly overhead, which might displace the seeds.

HARDEN OFF SEEDLINGS

Harden off seedlings before planting outside.

LEARN MORE

Learn more about planting, tending, harvesting and curing onions by swiping up below.

I’ve spent the last decade teaching my followers how to grow their own food. Growing veggies doesn't always mean you need a ton of space. Learn more about growing onions from seed to harvest by tapping the link below.