Calendula likes loose, breathable, fertile soil with good drainage. When potted indoors, pot soil can be prepared with 4 parts of garden soil, 4 parts of humus soil, 2 parts of sand, or 3 parts of peat soil, 3 parts of humus soil, 3 parts of sand and 1 part of perlite. Because calendula likes moist soil and is afraid of drought and waterlogging, you keep the soil moist in the shed at the initial stage. After the cultivation survives, the soil in the shed remains dry to promote the growth and development of roots, and the flowerpot remains moist throughout the growing season.
calendula likes fertilizer and is barren-tolerant. Under the condition of sufficient nutrients, the plant grows vigorously, and the flowers are large and many. Because there are certain nutrients in the pot soil, calendula doesn't need topdressing at the initial stage of cultivation. When branches grow at the root of the plant, it is necessary to start topdressing 1 times of liquid fertilizer or 1, times of flowers every 15 days. In bud stage, 15 times of liquid fertilizer is mixed with 5 times of potassium dihydrogen carbonate, or 1, times of multi-purpose fertilizer is used for 2 to 3 times. The liquid fertilizer is mixed every 1 to 15 days after flowering. Here are the management methods of calendula in different seasons: < P > 1. Spring management;
After the temperature rises in spring, calendula grows vigorously and blooms in large quantities, and the demand for nutrients is great. At this time, it is necessary to strengthen the supply of water and fertilizer to ensure sufficient light; For example, calendula that has blossomed last winter can be pruned appropriately to reduce the height of the plant, and liquid fertilizer should be applied in time after pruning to promote the germination and flowering of new branches.
second, summer management;
In the area with cool summer temperature, calendula can bloom from spring to autumn, which requires water and fertilizer supply, sufficient light and proper pruning. In the area with hot summer weather, calendula will die in summer if there is no cooling facility, so it is not suitable for cultivation in summer.
third, autumn management;
calendula is usually sown in September. After transplanting, the soil is kept moist and full of light, and no fertilization is needed. Because calendula has strong cold resistance, it can be placed outdoors after the temperature drops in late autumn, which is not conducive to improving the cold resistance of plants. However, if the temperature drops sharply in late autumn, it should be protected to prevent the plants from frostbite. If the plants want to bloom ahead of time and the outdoor temperature drops to about 5℃, the flowerpots should be moved into a closed balcony with light for cultivation in time.
fourth, winter management;
calendula doesn't need cold protection in the south of the Yangtze River basin, and it should be protected in the north of the Yangtze River when the temperature is low in winter. You can put the flowerpot in a closed balcony with light or cultivate it indoors. When the temperature is low, calendula grows slowly, and the soil in the pot should be kept dry.
In winter, marigold is planted in a closed balcony with high temperature and light. Generally, it will bloom in December, and it will continue to bloom. At this time, water and fertilizer supply and sufficient light should be ensured.
In addition, because the flowering period of calendula is very long, water and fertilizer supply and sufficient light should be paid attention to during the flowering period. When the plant is high, it should be pruned in time. When the Han Xin of calendula blooms in winter is poor, attention should be paid to cold protection. The plant can be plucked once in the early stage of growth to promote the plant to germinate and branch more. After flower failure, the residual flowers should be picked in time to prevent nutrient loss and promote the germination, growth and flowering of its lower branches.