I bought seed packets to get my garden started, plus a few seedlings because I'm not very experienced as a gardener and some things I just completely failed at growing from seed. I've saved seeds from my marigolds and a few other things I grew.
I LOVE saving seeds where I can - embracing the "food is free" philosophy! I save seeds from my pumpkins and rockmelons and plant (okay...dump them!) them in my compost heap - they love it there! I hate forking out money on seedlings - you pay so much more than for seeds and get so much less...but If it's herbs or something that will be a high yield I don't mind so much. Especially parsley - I read on my parsley seed packet that the seeds take a month to germinate...I've forgotten where I put them and planted something over them long before that! lol
I year, long ago, I looked over our verandah, & saw a very long pumpkin plant growing along the fence line on our side! It did have a bit of sun then, but it died off before the flowers turned into seeds!
It's very overgrown with awful privet now, down by the fence line!!!