A tall, robust biennial or short-lived perennial classically seen in cottage gardens, with single, shallowly lobed, rounded leaves and long erect spikes of open funnel-shaped flowers to 10cm (4”) across in shades of white, pink, red, and purple. Excellent for a large and dramatic cut-flower vase.
How to care for Alcea rosea Single mixture:
Plant in full sun to light shade, in well-drained, humus-rich soil. Amend heavy or clay soils with compost prior to planting. Space plants 60-90cm (2-3ft) apart to allow for their upright, bushy habit. Provide sturdy support as the tall stems may require staking.
Apply a thick organic mulch around the base to retain moisture and suppress weeds. Deadhead spent flowers regularly to encourage extended blooming.
In cold winter regions, apply a layer of protective mulch around the crown. Cut old stems back when new basal growth is seen in spring.
All hollyhocks are prone to rust and organic control may be obtained by good air flow, regular removal of affected foliage, and avoiding watering the leave can all help keep it in check.