Ideal Temperature for Purple mullein
Images of Purple mullein
Signs of Cold Temperatures in Purple mullein
Symptoms
Purple mullein tolerates cold well and flourishes best when temperatures exceed 60℉. In winter, it needs to stay above 55℉. If temperatures drop below 50℉, while winter changes might not be obvious, spring may see reduced or absent sprouting.
Solutions
In spring, remove any sections that did not sprout.
Signs of Warm Temperatures in Purple mullein
Symptoms
In summer, Purple mullein should be maintained below 70℉. When temperatures surpass 75℉, the plant's foliage might lighten, curl easily, suffer 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 midday and afternoon sun, or use a shade cloth. Water the plant in the morning and evening to maintain soil moisture.
