foxgloves, explained

Here's a picture of the one time we had foxgloves
bloom in the yard. The next year, nothing.
So I put in a dozen more last spring as seedlings, and now, a year later-- it appears we will have blooms again.
Here, via Michele over at Garden Rant, is a good explanation of how foxgloves (biennials) work in the garden. And it's looking like, if I want to be sure I'll have blooms next year, I should plant more seedlings now. Just to be sure. (Our winter climate being more hospitable than hers).