I've done that! Most of the big seeds are sunflowers, usually. I had a
bird feeder for a while, but when my cats started bringing me feathered
corpses (thanks guys) I removed the feeder. I sprouted the seed in
shallow dirt on my balcony just for fun, and got lots of nice seed
Of course, I don't know what seed are in your mix, but I'm sure the bag
will tel you.