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It grows best in 70 to 75 degrees Fahrenheit (21 to 24 degrees Celsius) weather.   They should bloom for approximately 2 weeks. The blooms will last longer in a 65-degree temperature (18.3 Celsius) than a hotter temperature. Add liquid houseplant fertilizer at regular intervals. 5 cm) from the bulb when they start to die. When the flower stem wilts, cut it off where it meets the bulb. You can maintain the plant as a green plant for several weeks or months.
Place the pot in direct sunlight for the first few weeks of care. Water the bulb very sparingly until it reaches 2 inches (5 cm) of new growth. Turn the base of the pot every week to encourage straight stalk growth. Move the pot to indirect sunlight when it starts to bloom. Water the amaryllis flower regularly, as you would most house plants. Cut the flowers off 1 inch (2.