Ideal Temperature for Thorny thistle
Images of Thorny thistle
Signs of Cold Stress in Thorny thistle
Symptoms
Thorny thistle exhibits high cold tolerance, but winter temperatures should remain above 25℉. Should temperatures fall below this point, while no immediate changes may be apparent in winter, a reduction or complete absence of sprouting could occur in spring.
Solutions
During spring, remove any sections that have not sprouted.
Signs of Heat Stress in Thorny thistle
Symptoms
Thorny thistle does not tolerate elevated temperatures well. When temperatures surpass 70℉, its development ceases, and it becomes more prone to decay.
Solutions
Remove any parts that are scorched or dried out by the sun. Relocate the plant to an area offering protection from the midday and afternoon sun, or utilize a shade cloth for cover. Water the plant in the morning and evening to maintain soil moisture.
