Gladstone Onion


Gladstone Onion | Certified Organic by Ecocert Canada
Allium cepa | Biennial | Open Pollinated | Heirloom

Very well-known variety in central and northern regions of the United States. Dark green foliage that is excellent for bunching. Decent storage potential. Medium size bulbs that are 4-5”. Original Breeder: Bejo Seeds.

Planting tip: Start indoors 10-12 weeks before the transplanting date. Trim seedling to 1” when it reaches 5” to increase thickness.

Harvesting tip: When tops dry up and fall over harvest for storage variety. Cure for 3-5 days in the fields. Alternatively, cure in the greenhouse at 23-26°C and 80% humidity.

Storage tip: Cool and dry slowly to elongate the dormancy period. Onion can also store in a root cellar at 0-1°C and 65-70% humidity.



Seed depth : 1/8-1/4’”

Plant spacing : 3-4” Medium Sized
4-6” Large Sized

Row spacing : 18-30”

Sun tolerance level : Full Sun

Days to germination : 6-12 Days

Days to maturity : 105 Days

Germination temperature : 7-32°C, optimally 20-25°C


Additional information

Onion Seed Count


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