Gardenia "sleep" temperature requirements

Reader Chen Gang: I bought two pots of gardenia, and after the blossoms, the blades slowly appeared dry tips and leaves fell off. I would like to know what is the reason for this. How does Gardenia spend on autumn and winter care?

“You have something to do with your speech” columnist: In late autumn, the weather gradually cooled, and most of the family’s planted pot flowers passed the flowering period. The City Bureau of Landscape Architecture flower cultivation experts will give pointers to your situation.

According to experts, gardenia flowers are warm, sunny, and have good air-humidity and a well-ventilated environment. They are typical acidic soil plants and should be planted in loose, moist, fertile, well-drained acid basin soils. It should be noted that gardenia is poor in cold resistance, leaves with low temperature tend to fall off, and the dry environment tends to cause sharp dry leaves. Now this season, gardenia has entered a dormant period, and conservation should grasp the main points and methods of treatment.

1. Light. It must be allowed to fully accept the sun, more sun, in order to promote growth.

2. Temperature: In the autumn and winter seasons, the gardenia should be placed in sunlight, and the temperature should be no lower than 0°C. Need special attention, too high temperature will affect the flowering in the coming year. Generally should be maintained at 5 °C ~ 12 °C, the temperature higher than 15 °C, ventilation should be cooling, otherwise it will affect plant dormancy.

3. Humidity: Gardenia is like a moist environment, and the air is too dry, which can easily cause the blade to dry. In autumn and winter of Tianjin, the rainfall is scarce and the air is dry. It is necessary to frequently spray the leaves with fresh water and sprinkle water on the nearby ground to increase the air humidity.

4. Fertilization: less fertilization or no fertilization.

5. Watering: Watering with tap water, it is best to store for two days, after sufficient precipitation. Home rice water and vegetables are also available. Watering in autumn and winter is preferred for partial dryness. Soils that are too wet can cause roots to die off. It is important to prevent water from leaching and yellowing. Because the temperature is low, the watering cycle should be controlled and watering can be done 5 to 7 days. Watering must be thoroughly dry. Always wash branches with warm water and do not allow dust to foul the foliage.

The gardenia leaves a layer of old leaves every autumn, growing new leaves and buds. At this time, gardenia leaves yellow, mostly old leaf replacement, natural leaves, yellow leaves can be removed. Yellow leaves may also be caused by too alkaline soil. Gardenia is susceptible to leaf yellowing in poor soils and alkaline soils, causing the leaves to dry and causing poor plant growth. At this point, watering the fertilizer can change the soil's alkalinity. The method is to add 0.1% of ferrous sulfate to the water and pour it once every 15 days; it is also possible to add 0.5% of vinegar when watering.

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