Like some huge tropical fern - those leaves are 2ft tall. The stiff upright flower stem is a bonus, but cut it off if you don't like sunflowers. Easy in any fertile, retentive soil, and best at the front of the border where its stature can be appreciated. Perfect for prairie-style plantings, but best grown with plenty of space around it, or at the front to show the leaves off.
The flowers rise high above the leaves - to 10ft or more, and are smaller and on more slender stems than laciniatum, but still very tall.