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Ideal Temperature Range for Japanese prickly ash
(Zanthoxylum piperitum)
Japanese prickly ash, also known as Japanese pepper tree, Euphorbia Species, Mountain Snow
Japanese prickly ash is native to temperate regions and prefers temperatures ranging from 68 to 95 °F (20 to 35 ℃). As seasonal temperature changes, it is suggested to provide supplemental warmth to maintain an ideal growth environment.
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What Is the Ideal Temperature Range for Japanese prickly ash?

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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 Japanese prickly ash

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Regional wintering strategies
Japanese prickly ash prefers relatively warm temperatures, so maintaining temperatures above 20°C during winter cultivation is beneficial for plant growth. The minimum temperature should be kept above freezing point to prevent the plant from freezing damage. When the outdoor temperature approaches -5°C (25°F) during winter, it is advisable to bring Japanese prickly ash indoors or provide protection by setting up a temporary greenhouse or using materials such as plastic film or fabric to wrap the plant.
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Signs of Low and High Temperature in Japanese prickly ash

Symptoms of Low Temperature in Japanese prickly ash
Japanese prickly ash has moderate tolerance to low temperatures and thrives best when the temperature is between 20°C and 35°C. During winter, it should be kept above 0°C. When the temperature falls below -25°C, the leaves may darken in color. In severe cases, water-soaked necrosis, wilting, and drooping may occur, and the color of the leaves gradually turns brown.
Solutions for Low Temperature in Japanese prickly ash
Trim away the frost-damaged parts. Immediately move indoors to a warm environment or set up a makeshift greenhouse for cold protection. When placing the plant indoors, choose a location near a south-facing window to ensure ample sunlight. If there is insufficient light, you can use supplemental lighting.
Symptoms of High Temperature in Japanese prickly ash
During summer, Japanese prickly ash should be kept below 35°C. When the temperature exceeds 38°C, the plant's growth slows down, the color of its leaves becomes lighter, and it becomes more susceptible to sunburn.
Solutions for High Temperature in Japanese prickly ash
Trim away the sunburned and dried-up parts. Move the plant to a location that provides shade from the afternoon sun. Water the plant in the morning and evening to keep the soil moist.
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