Tall Sunflowers

Since sugarbabes ask me; How do you plant sun flowers? Well Before we bought sun flower seeds and planted them about 6" apart but every year they come back because of the seeds from this year. That's why every year we got more and end up killing some of it Co's it takes too much space. Actually some of them are too close to each other but still looks nice. As you can see on the pictures they are as tall as our house. Even if those sunflowers in our garden they are taller than our shade, where we put all our garden tools.