Clivia is a beloved flowering plant that thrives in warmth, joy, and even cold. During winter, it requires special care and attention to ensure its health and vibrant blooms. To help your Clivia survive and flourish through the colder months, focus on four key areas: watering and fertilizing, temperature control, light adjustment, and extending the blooming period.
First, proper watering and fertilizing are essential. From autumn until the winter solstice, apply a balanced solid fertilizer, but reduce the amount of nitrogen and increase phosphate and potassium. Eggshells and cooked fish bones make excellent sources of phosphate, while wood ash and soot provide potassium. You can also use a mix of nitrogen, phosphorus, and potassium to encourage new growth. However, always apply fertilizers in moderation—avoid using raw or undiluted manure, as this can burn the roots or cause rot. If you notice yellowing roots or narrow, pale leaves during winter, it may indicate over-fertilization. On the other hand, if new leaves are small and weak, it could mean the plant isn't getting enough nutrients.
Watering should be done thoroughly each time, even after the flower buds appear. Combine watering with fertilization every 20 days or so, using diluted soybean cake water, fish water, or horse manure tea. However, when temperatures drop, reduce watering to prevent the soil from becoming too wet. Excess moisture can lead to root rot, but the soil shouldn’t be allowed to dry out completely either.
Second, maintaining the right temperature is crucial. Clivia prefers a temperature range of 15-20°C in winter, and should not be exposed to temperatures below 10°C. After the flower stalk emerges, keep the temperature around 18°C. A temperature difference of about 10°C between day and night helps the flower grow properly. If the outdoor temperature drops below 10°C at night, bring the plant indoors. In colder indoor conditions, place a thin layer of charcoal on top of the soil for insulation and move the pot to a sunny, warm spot. If the temperature is extremely low, cover the pot with a plastic bag to raise the temperature, but ensure it doesn’t exceed 25°C. If it does, ventilate to avoid overheating.
Third, adjusting the light is important for optimal growth. While Clivia enjoys a semi-shaded environment, it benefits from as much sunlight as possible during winter. Strong light can shorten the blooming period, while weaker light can extend it. Clivia grows best at 18-20°C, stops growing below 5°C, and remains safe above 0°C. Once brought indoors, ensure the plant receives adequate light by placing it in a sunny spot during the day. Before flowering, supplement with artificial lighting at night using a fluorescent lamp. Since Clivia has opposite leaves, prolonged exposure to one direction can cause uneven growth, affecting its appearance. Rotate the pot every 10 days, positioning the leaves either parallel or perpendicular to the window. The latter method tends to produce better results.
Lastly, to extend the blooming period, you can place the plant in a dark area when the flowers are about to open. Reduce watering and maintain a cooler temperature between 8-12°C. This technique can prolong the flowering period by 10 to 20 days. With these careful adjustments, your Clivia will continue to thrive and display its beautiful blooms throughout the winter season.
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