Ideal Temperature for Purpletop vervain
Images of Purpletop vervain
Signs of Cold Stress in Purpletop vervain
Symptoms
Purpletop vervain tolerates cold well and flourishes when temperatures exceed 60℉. In winter, it needs to stay above 50℉. If temperatures drop below 40℉, 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 Heat Stress in Purpletop vervain
Symptoms
In summer, Purpletop vervain should be maintained below 80℉. When temperatures surpass 90℉, plant leaves might lighten, curl, become prone to sunburn, and in severe instances, the whole plant could 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 cloth. Water the plant in the morning and evening to maintain soil moisture.
