Ideal Temperature Range for King protea

(Protea cynaroides)

King protea, also known as King sugar bush

King protea thrives in its native growth environment at an average temperature range of 20 to 28 ℃ (68 to 82.4 ℉). However, it can survive at a temperature range of 10 to 38 ℃ (50 to 100.4 ℉) and requires mild winter temperatures above freezing. In summer, keep the plant cool and moist to prevent leaf and bloom damage. In winter, ensure that the plant is in a well-ventilated and bright spot indoors or outdoors.

What Is the Ideal Temperature Range for King protea?

Ideal

Tolerable

Unsuitable

As you care for your plants, your bond with them will deepen. Trust your intuition as you learn about their temperature needs, celebrating the journey you share.

Temperature Essentials for King protea

Regional wintering strategies

King protea is extremely heat-loving, and any cold temperatures can cause harm to it. In the autumn, it is recommended to bring outdoor-grown King protea indoors and place it near a bright window, but it should be kept at a certain distance from heaters. Maintaining temperatures above 20°C during winter is beneficial for plant growth. Any temperatures approaching 0°C are detrimental to the plant.

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Signs of Low and High Temperature in King protea

Symptoms of Low Temperature in King protea

King protea prefers warm temperatures and is not tolerant of low temperatures. It thrives best when the temperature is above 20°C. During winter, it should be kept above 0°C. When the temperature falls below -5°C, the leaves may lighten in color. After frost damage, the color gradually turns brown or black, and symptoms such as wilting and drooping may occur.

Solutions for Low Temperature in King protea

Trim off the frost-damaged parts. Immediately move indoors to a warm environment for cold protection. Choose a spot near a south-facing window to place the plant, ensuring ample sunlight. Additionally, avoid placing the plant near heaters or air conditioning vents to prevent excessive dryness in the air.

Symptoms of High Temperature in King protea

During summer, King protea should be kept below 38°C. When the temperature exceeds 43°C, the color of the leaves becomes lighter, and the plant becomes more susceptible to sunburn.

Solutions for High Temperature in King protea

Trim away the sunburned and dried-up parts. Move the plant to a location that provides shade from the midday and afternoon sun. Water the plant in the morning and evening to keep the soil moist.