Characteristics Garden Flowers Throatwort. Shelter in winter requires storage room. Flower size small. Fragrant flower fragrance. Cold hardiness zone 7 (-18 to -12°C), 8 (-12 to -7°C), 9 (-7 to -1°C), 10 (-1 to +4°C). Height of plant (cm) 30-70 cm. Water needs moderate. Flower color lilac, pink, purple, light blue, white. Landscape use container, flowerbed, border, rock garden. Type of stem erect. Timing of flowering autumn, august. Not poisonous plant. Method of cultivation seedling. Lifetime annual, perennial. Light needs full sun. Does not tolerate frost. Neutral soil, acid soil. Sandy loam soil, loamy soil.
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