Hollyhock has been a gardening go-to for centuries! This mix, growing up to 7' tall, is ideal for adding height interest to a back border. Crepe-textured blooms are fully double and loved by butterflies and hummingbirds. Juglone tolerant, so it's safe to plant around Black Walnut trees. Alcea rosea 'Chater's Double'. Covers 40-60 sq ft when planted together.