Add some flavor to your garden with our organic Yellow Onion seeds! These seeds are organic, non-GMO, and heirloom so you can grow the highest quality harvest.

Instructions:

We recommend using the following to sow the seeds: 

• 12 Cavity Greenhouse or Planter with Humidity Dome
• Soil Pods 
• Liquid Fertilizer 

These prefer full sun, but can grow by a bright windowsill or under powerful grow lights more slowly and producing a smaller harvest. You can harvest the green stems in 90-100 days, the 3-6” bulbs mature in 90-120 days and prefer cooler temperatures. You can plant them in the fall and have them overwinter and harvest in the spring, or plant them in the spring to harvest in late summer.

(Find more info on germinating seeds by going to our seed guide)

These seeds are for the 2026 growing season.

About the seeds:

difficulty	beginner | intermediate | advanced
germination time	4-10 days
depth	1/2”
spacing	4"-6“ or 1-2 seeds per soil pod or nursery pot
recommended planter	6"-12" planter or garden bed
time to maturity	90-120 days
seed prep	pre-soak | scarification | stratification | none
method	greenhouse | paper towel method
temperature	55F - 75F

About the Plants:

description	large bulbs with long green onion stems
difficulty	beginner | intermediate | advanced
growth speed	slow | medium | fast
size of plant	12"-18" tall with 3”-6” bulbs
light	full sun | partial sun | shade | grow lights
soil	sandy coconut coir/peat-based potting mix, pH 6.0-7.0
temperature	warm | cool
pet-friendly	cats | dogs | no
pests	thrips, aphids, fungal blight
fertilization	heavy | moderate | light