This is my first year growing tithonia. I started from seed indoors, planted outdoors in late May. I don't recall the variety, but it was a Burpee seed pack, and allegedly they were supposed to grow to about 3' high. Well, they are now close to 7', and not a single bloom or bud. They just keep getting taller. They get watered well once per day, twice if the temp is really high. The area they are in get some morning shade, with full sun from noon-late afternoon.
Any suggestions on what I did wrong, or what I could do to force a bloom? It looks like I have giant weeds in the garden!