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
Shenzhen International Garden and Flower Expo Park Shenzhen International Garden and Flower Expo Park Shenzhen International Garden and Flower Expo Park (; referred to as Garden Expo Park) is a public, urban park in Futian District, Shenzhen, Guangdong, China. Located in West Zhuzilin, Shenzhen International Garden and Flower Expo Park is bordered by Shennan Avenue on the South, Qiaochengdong Road on the West, Qiaoxiang Road on the North, and Guangshen Expressway on the East. It covers an area of . It serves multiple functions, including garden and flower expo, arts and culture, science education, tourism, exhibitions, and solar power grid-connected electricity generation. It officially opened on September