Alcea rosea · Perennial
Hollyhock rust: Non-chemical control: Check plants regularly and remove and dispose of affected leaves.; Dispose of heavily infected plants.; Do not use seed from affected plants.; Monitor bought-in plants closely.; Grow as a biennial and discard after flowering; alternatively hide leaf symptoms behind shorter front-of-border plants.. Chemical control: Difficult; fungicides offer limited success because airborne spores travel long distances. Should only be used minimally and in a highly targeted manner if at all.
Slugs: Use standard UK slug control (cultural barriers, hand-picking, biological controls as appropriate).
Cutworms: Use standard UK cutworm control (collars, cultural controls as appropriate).
Aphids: Use standard UK aphid control (encourage predators, targeted treatment as appropriate).
Capsid bugs: Monitor plants and remove affected growth; targeted treatment if severe.