Characteristics Garden Flowers Hollyhock. Height of plant (cm) higher 100 cm. Type of stem erect. Fragrant flower no fragrance. Flower size large. Shelter in winter requires shelter. Landscape use flowerbed, specimen, border. Flower color burgundy, black, pink, yellow, red, white. Method of cultivation non seedlings. Cold hardiness zone 4 (-34 to -29°C), 5 (-29 to -23°C), 6 (-23 to -18°C), 7 (-18 to -12°C), 8 (-12 to -7°C), 9 (-7 to -1°C). Timing of flowering autumn, august, july. Light needs full sun. Water needs moderate. Lifetime biennial. Not poisonous plant. Sandy loam soil, loamy soil. Neutral soil. Frost resistance.