Last year I wanted to try growing sunflowers and chose a giant sunflower variety. I poked a hole in the ground with a screwdriver and dropped a seed in, continuing until I planted the whole package.
I watered the area slowly so water would soak deep into the ground. I watered again a few days later, and then a third time. After that, I left the seeds alone and the plants grew and grew. I was surprised at how many different varieties of bees and butterflies came to the flower heads, and also some hummingbirds.