Growing a cut chrysanthemum in a greenhouse
As you know, chrysanthemum belongs to late flowering autumn plants. But thanks to growing chrysanthemums for cutting in a greenhouse, you can get a harvest of flowers not only in autumn. Controlling the flowering process, ready-made chrysanthemums are cut three times a year in the winter-spring months. However, just planting flowers in a greenhouse is not enough.
In order to have high large inflorescences in 4-5 months, you need to create suitable conditions for the plant and strictly adhere to the requirements for:
- soil;
- temperature regime;
- lighting;
- watering;
- fertilizer.
Soil for greenhouse planting of chrysanthemums
For growing chrysanthemums in a greenhouse, you can use ordinary soil as a basis, to which you can add a little sand and humus. To enrich the soil, also add lime, potassium sulfate, calcium nitrate and superphosphate in proportions 5: 5: 2: 3 per 1 cubic meter. Read:chrysanthemum in a pot home care and reproduction!
Thermal regime
Accelerating the cultivation of chrysanthemums requires compliance with the temperature regime at different stages of growth. When disembarking, the most suitable temperature is no more than 18 degrees Celsius. When the first buds appear, the temperature should be reduced to 10 degrees, this will allow the plant to survive longer until the time of cutting.
Greenhouse cultivation of chrysanthemums allows you to regulate the moment of obtaining inflorescences by bringing it closer or moving away. So, an increase in the temperature in the greenhouse to 20 degrees brings flowering closer by a week and a half, respectively, a decrease in temperature pushes it back.
Since the laying of new leaves and buds occurs at night, it is especially important to maintain the temperature around 16-20 degrees at this time. In summer, the greenhouse is cooled to 22 degrees, and in winter, it is heated to 18 degrees.
Daylight regulation
As in the case of the temperature regime, regulating the length of daylight hours affects the flowering of chrysanthemums. These flowers are characterized by short daylight hours. When the illumination is less than 14 hours, the receptacle is laid, and the more such days there are, the larger the flower will have. The flowers themselves are laid with a daylight hours of 13 hours or less.
To form a beautiful large flower, you need to leave the strongest shoot, and remove the rest, including the lateral buds.
For the formation of a tall shoot and a large flower, most cut chrysanthemums after planting in the ground need to be grown for 4 weeks with a 14-hour daylight hours. The decrease in the length of daylight hours and the period of growing chrysanthemums in such conditions depend on their variety, usually from 6 to 12 weeks of growth.
In summer, greenhouses need to be protected from the sun with a film, and in winter they must be installed additional lighting.
Features of watering greenhouse chrysanthemums
Chrysanthemum needs good watering for faster growth. It can be provided with drip irrigation, especially if the plants are planted in beds. In early autumn, chrysanthemums should be watered before lunchtime, and closer to winter - early in the morning, so that the leaves have time to dry by night.
Since the level of humidity in greenhouses is always increased, for the prevention of diseases it is important to ventilate the room well after watering chrysanthemums.
Chrysanthemum fertilization
The first feeding of chrysanthemums is carried out 10 days after planting. During the period of active growth, chrysanthemum needs nitrogen fertilizers, and after the formation of inflorescences - in potassium and phosphorus. Fertilize by root application. In this case, the dosage must be strictly observed so as not to harm the plants. In addition, for the prevention of various diseases and pest control, chrysanthemums should be treated with complex preparations.