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Hundreds of species and varieties belong to the chrysanthemum genus; the most cultivated ones are hybrids with autumnal and winter flowering. They are perennial herbaceous plants, they produce small compact, roundish shrubs, with jagged leaves, opaque green, sometimes bluish. In autumn, on erect stems, large flowers bloom in flower heads, of various colors, from pink to yellow, from red to purple; widely used for the production of cut flowers. They are grown in the garden, in full earth or in pots, in a sunny or partially shady place. The chrysanthemums do not fear the cold and can also be grown in places with very cold winters. During flowering we remind to water the chrysanthemums only in case of drought, and in any case avoiding to wet the flowers, which tend to ruin and rot if kept too humid. After flowering the plants are pruned at about 10-15 cm from the ground so that during the winter the vegetation does not suffer from the cold; in spring it is possible to divide the baskets, unearthing the clumps before they begin to produce new foliage: once cleaned, the tufts from the ground are divided into portions, maintaining a good quantity of roots for each portion practiced; these parts of the head are immediately put to stay, where they will develop new plants. To obtain abundant blooms it is advisable to practice the division every 3-4 years, and to provide fertilizer from March to November, every 10-12 days, mixed with the water of the waterings.