Ideal Temperature for Japanese Iris
Images of Japanese Iris
Signs of Cold Stress in Japanese Iris
Symptoms
Japanese Iris tolerates cold well and flourishes optimally when temperatures exceed 59℉. In winter, maintain temperatures above 50℉. If temperatures drop below 32℉, while winter changes might not be obvious, spring may see reduced or absent sprouting.
Solutions
In spring, remove any sections that have not sprouted.
Signs of Heat Stress in Japanese Iris
Symptoms
In summer, Japanese Iris should be kept below 75℉. When temperatures surpass 86℉, the plant's leaves may lighten, curl, become prone to sunburn, and in severe cases, the whole plant might wilt and dry out.
Solutions
Remove any sun-damaged and desiccated portions. Relocate the plant to a spot offering protection from midday and afternoon sun, or use a shade fabric. Water the plant in the morning and evening to maintain soil moisture.
