What does "a dramatic annual shrub" mean? [closed]

dramatic = "very sudden or noticeable, or full of action and excitement"

Cambridge dictionary

I emphasis noticeable because plant lovers like a plant to be noticeable for its colour or form. And the castor bean plant (Ricinus communis) is certainly noticeable for both colour and form. Being either an annual grown from seed or grown as a perennial, it may confidently be described as a dramatic annual or tender perennial shrub.

In the comments, richardb adds:

It should be parsed as dramatic (annual or tender perennial) shrub, not (dramatic annual) or (tender perennial) shrub