Your conditions indoors are important, too. How tall are these supposed to get? For example, I bring that up because plants from the nursery are pretty much full height when they go on sale. We buy it and then transplant it either while it's about to bloom, in bloom, or after the blooms have faded. In other words, we can transplant them at many stages from a small pot to the ground, so maybe however tall and mature they do get in your home, is still OK, and starting them indoors is a great idea.

Thanks for the reply. I planted the bulbs directly outdoors instead.