You’re welcome! Glad you found this article useful!

Sure, Kelsey! Our current favorite white onion is the Talon, our favorite yellow is Patterson and for reds, we go with Red Mountain. We do change things up on occasion, but these varieties have graced our northern gardens more than a few times. Really, any long day onion will do just fine. So, feel free to check out varieties like Cartier, Cortland, Red Bull, Redwing and even the famous Walla Walla. There’s lots of other long day varieties, too, that’s just a smattering. Good luck with those allium!

Greetings! You are welcome! When we start them indoors, we typically have our lights going for 14-16 hours per day, so definitely still “long day” exposure. Onions have a life span and at a certain point, they stop growing. (When the shoots fall over and the bend starts to look not green, they’re done growing.) The colder conditions we see do somewhat limit the size, but we still see “mostly” 3-4″ onions with a few smaller ones. I’d suggest trying the monthly fertilizer trick we mention. Also, maybe try different genetics too, the type of onion can often determine final size. Keep on trying! Home grown onions are delicious!

Hi! Thank you for this!!!!! Im a gardener in Northern Canada at North of 65 degrees. I am on my 5th year of trying to grow onions and I’m not ready to give up yet!!! I find I can get them to the size of a 2-3” wide onion but then they just stop growing in August. Do you find when you are starting them inside that they get the long day exposure? Or do you put lights on?

Thanks for your kind comment! I checked your link and it does say “good for Canadian gardeners” – so, it’s almost positively a long day variety. Also, a native Canadian shop like you linked “should” know the difference and won’t sell things that don’t work. (It’s more of a US problem, since we have both short and long day…and many of our readers may be using seed suppliers that sell both types.) If you don’t see confirming information from the seed seller, you have a couple additional options. You can research the specific varieties you’re interested in purchasing, chances are really good someone will have documented it. The other option would be to go with sellers that do make the effort to distinguish the varieties.