Ideal Temperature for Northern blue flag iris
Images of Northern blue flag iris
Signs of Cold Temperatures in Northern blue flag iris
Symptoms
Northern blue flag iris tolerates cold well and flourishes when temperatures are above 60℉. In winter, it needs to stay 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 Warm Temperatures in Northern blue flag iris
Symptoms
In summer, Northern blue flag iris should be maintained below 75℉. When temperatures go above 85℉, the plant's leaves might lighten, curl easily, suffer from sunburn, and in extreme cases, the whole plant could wilt and dry out.
Solutions
Remove any parts that are sunburned and dried. Relocate the plant to a spot offering protection from the midday and afternoon sun, or use a shade cloth. Water the plant in the morning and evening to maintain soil moisture.
