Growing marigolds

Has anyone seen Marigolds grow this big?  I grew these Burpee Marigolds all from seed and can you believe how tall they are?  I usually see low lying marigold plants at the garden center.  They are finally starting to bud.  I can't wait to see them flower.  The best thing about marigold is, you can save the seed for next year.  When the flower dies keep the flower head and pull the seeds off - store them somewhere cool and plant them the next year - no need to spend any money next year.  Marigolds are the easiest flower plants to grow, all you need is good soil and frequent water.