I want to try some mini pumpkin varieties this fall (Wee B Little, Jack Be Little, Hooligan) and I'll be trying containers for those because I already planned all my ground space for larger jack o'lantern varieties that need it more.

So what's the smallest container size I could reasonably get away with? I'm not new to cucurbits, but I am to container gardening, plus I've never grown tiny pumpkin varieties before so I'm not sure how their size compares. I'm assuming something like a 5 gallon bucket is the absolute minimum and I'd just be wasting seeds if I tried anything less?