Alcea "Alcea" species are used as food plants by the larvae of some Lepidoptera species including "Bucculatrix quadrigemina" and "Vanessa cardui", the painted lady. The mallow flea beetle ("Podagrica fuscicornis") is a pest that makes tiny holes in the leaves. Cutworms, aphids, and capsid bugs use the plant as a food source in hotter and drier conditions. A number of weevils use "A. rosea" as their host plant, including "Rhopalapion longirostre", "Alocentron curvirostre", and "Aspidapion validum". The plants are also susceptible to the pathogenic fungus "Puccinia malvacearum", the hollyhock rust. A hollyhock flower, known in Japan as , was incorporated into
Northwest Flower and Garden Show Northwest Flower and Garden Show The Northwest Flower & Garden Show (also known as the Northwest Flower & Garden Festival) is an annual exhibition of horticulture and gardening held in Seattle, Washington, for five days each February. It is the largest garden show west of Philadelphia and is regarded as the second largest garden show in the country. It is held at the Washington State Convention Center, and has been since the first year. The show has lush, fully built display gardens (which are judged for awards), over 100 educational and entertaining seminars, and a garden marketplace exclusively for plants,