What is the rarest color of hollyhock?

Question

What is the rarest color of hollyhock? I was told that if you get a yellow hollyhock that the color was rare.

Answer 1

Yellow hollyhock are actually not that rare at all and colors vary with
shades of carmine-rose, crimson, lemon, lilac, pink, purple, bicolor and white. In fact, one of the rarest hollyhock colors is black (Alcea rosea nigra–actually very dark purple or dark red).