Hollyhocks are a traditional feature of cottage garden borders and 39halo mixed39 adds height and colour with tall stems almost 2 metres 406ft 63441 high full of bi45coloured flowers with shades of pink purple white red and yellow once planted they will flower the following year and every year thereafter alcea rosea do well in sunny positions and are longer flowering than other hollyhock cultivars and will will bloom from june to july they are great pollinators and