High temperature overwintering is not suitable for all flowers.
This article will explain the common knowledge of flower cultivation for you. High temperature overwintering is not suitable for all flowers, let's learn about it together.
Some flower growers, out of love for their own flowers, think that putting all the flowers into a greenhouse during winter is the best way for them to overwinter. However, it is not suitable for all flowers to overwinter in high temperatures.
Flowers that need to overwinter in a cold greenhouse, such as potted camellias, azaleas, rhapis, laughing orchids, and Hippeastrum, should pay attention to ventilating and cooling on sunny days after entering the greenhouse. Do not indulge in high temperatures. High temperatures will break the dormancy of flowers, causing them to enter a growth state, which in turn greatly reduces their cold resistance and makes them prone to frost damage.
Flowers that need to grow in a greenhouse and bloom in winter or early spring, such as Cineraria, Primula, Calceolaria, Cyclamen, and Zantedeschia, can maintain a daytime temperature of 15°C to 20°C. If the temperature inside the greenhouse is too high, it should be ventilated and cooled. At night, they need to be covered and insulated. If the temperature is too low, it should be increased to keep the greenhouse temperature at around 5°C, and should not be lower than 0°C.
The air humidity inside the greenhouse is high, and special attention should be paid to the prevention and control of fungal diseases such as black spot and powdery mildew. To meet the needs of different flowers and facilitate daily management, it is best to plant the same variety in a plastic greenhouse. If conditions do not permit, they should also be arranged according to their different temperature requirements. In the greenhouse, the south side has strong light and higher temperatures; the north side has weaker light and relatively lower temperatures. Flowers can be arranged in different areas according to the light and temperature inside the greenhouse. Flowers growing in the greenhouse should be moderately controlled for watering, keeping the soil "dry and wet", and often ventilated to toughen the seedlings, promoting their robust growth.
Flowers that need to overwinter in a high-temperature greenhouse, such as Maranta, Croton, cacti, bromeliads, Pachira, Dracaena, and tropical orchids, can be covered with insulating materials on the outside of the greenhouse to prevent heat loss at night. This method is extremely effective on sunny nights. Additionally, a simple shed can be placed inside the greenhouse to form a double-layer shed. The distance between the two layers of plastic film should be about 10 centimeters. The air thermal conductivity coefficient in the middle is small, with good insulation effect and stable greenhouse temperature. When additional heating is needed inside the greenhouse, electric heating or boiler heating can be used, but these two methods consume a lot of energy and are costly, so they should only be used for short periods of time when it is particularly cold or during snowy weather. Flowers that like high temperatures for dormancy overwintering should stop fertilizing and control watering to keep the soil in a semi-dry state to prevent root rot and seedling death. On sunny days, when the temperature inside the greenhouse reaches 25°C, it should be ventilated to remove moisture.
The above is a comprehensive introduction to why high-temperature overwintering is not suitable for all flowers, hoping to bring some knowledge about green plants to greenery enthusiasts.