Ideal Temperature for Blue vervain
Images of Blue vervain
Signs of Cold Stress in Blue vervain
Symptoms
Blue vervain tolerates cold well and flourishes optimally when temperatures exceed 65℉. In winter, it needs to stay above 60℉. If the temperature drops below 50℉, 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 Blue vervain
Symptoms
In summer, Blue vervain should be maintained below 75℉. When temperatures surpass 85℉, the plant's leaves might lighten, curl, become prone to sunburn, and in severe instances, the whole plant could wilt and dry out.
Solutions
Remove any parts that are sunburned and desiccated. Relocate the plant to a spot offering protection from the midday and afternoon sun, or use a shade fabric. Water the plant in the morning and evening to maintain soil moisture.
