In autumn, the climate gradually changes from cool to cold. At this time, potted flower management should pay attention to the following management work. Appropriate amount of water and fertilizer: after autumn, water and fertilizer management should be treated differently according to the habits of different flowers. For autumn chrysanthemum, osmanthus, camellia, azalea, wintersweet, etc. Flowering once a year, timely topdressing liquid fertilizer mainly containing phosphate fertilizer for 2~3 times, otherwise not only the flowers will be small, but also the buds will drop. For roses, Milan, jasmine, etc. Flowers should bloom many times a year, and sufficient water and fertilizer should be continuously supplied to keep the flowers blooming. For most flowers, after the cold dew festival in northern China, there is generally no need to apply fertilizer to help them spend the winter. As the temperature drops, we can continue to water the flowers planted in autumn according to the actual needs of each flower, except those that bloom in autumn, winter or early spring. For other flowers, it is necessary to gradually reduce the number and amount of watering to avoid excessive water and fertilizer, causing excessive growth, affecting flower bud differentiation and suffering from freezing injury. Pruning and shaping: When the temperature is around 20 in autumn, most flowers tend to sprout more new branches. Except the part that needs to be kept, the rest should be cut off in time to reduce nutrient consumption. The reserved buds should also be picked in time. Chrysanthemum, dahlia, rose, jasmine, etc. In autumn, when the buds grow to a certain size, all the lateral buds are removed except one big bud with a good top. Timely seed collection: The seeds of many flowers mature one after another around the Mid-Autumn Festival, and need to be harvested in time. Red rope, dill, morning glory and other seeds. Collecting, removing impurities, drying in the sun, packing in a cloth bag, and storing in a low-temperature ventilated place. For some seeds with thick seed coat, such as peony, peony, magnolia and Michelia. After harvesting, it is best to bury seeds in wet sand and store them in accumulated sand. Sow in time: biennial or perennial flowers such as snapdragon, carnation and daisy, greenhouse flowers such as honeysuckle, cyclamen and nutmeg, and flowers such as Gerbera jamesonii, delphinium, primrose and begonia that are easy to lose their germination ability after harvesting should be planted in autumn. Enter the house at the right time: most flowers in northern China should be moved indoors for wintering according to their cold resistance to avoid freezing injury. The specific time to enter the room varies from flower to flower. For most flowers, don't rush into the room as soon as the weather changes order. Because entering the house too early affects nutrient accumulation, which is not conducive to growth and development in the coming year. Therefore, on the premise of not catching a cold, it is better to enter the room later.