Last spring I tried sprouting some sunflowers from the seeds in our bird food. Though they sprouted fine my set up wasn't very good and I lost them. I decided to sow some seeds directly in a flower bed on the side of the house and though a few sprouted, but they didn't grow very much. What was super interesting is that two random sunflowers popped up in the veggie garden, most likely from all the seeds the chickadees cached in the area. I let them be and hoped they would blossom and seed in time before winter, but the growing season wasn't quite long enough. I would have loved for our chickadees to get to eat directly from a flower they had planted themselves, these little guys successfully bred in our nest box so they are extra special to us:) I'll try again next spring with indoor germinating so they have a better chance:)
We are lucky to live in an area surrounded by spruce trees, birch, choke cherries as well as all kinds of other native plants and dense forest. We have gardens too, both ornamental and some fruits and veggies. Thought there is a wet area nearby, it isn't running water, so a good bird bath with running water is needed. I've also just picked up a nesting box that we'll hang up in the next couple of days, I'm still thinking about where is the best place. Our feeder birds love black sunflower, so I plan to grow some straight from our bird seed around the yard!