Plant Collection Best Biennial Plant to Grow Hollyhock See More Common hollyhock (Alcea rosea) is a stalk-flowering plant known for its height and attractive flowers. It regularly reaches head height or beyond – from 5 to 8 ft tall. The presence of Common hollyhock in a garden can also attract butterflies and hummingbirds. Add toContinue reading “Best Biennial Plant to Grow”

