Ideal Temperature for Common douglas-fir
Images of Common douglas-fir
Signs of Cold Stress in Common douglas-fir
Symptoms
Common douglas-fir exhibits exceptional cold hardiness, yet winter temperatures should remain above -20℉. Should the temperature fall below this point, while no immediate changes might be apparent in winter, branches could become fragile and parched by spring, with no new growth appearing.
Solutions
During spring, remove any lifeless branches that have not developed fresh foliage.
Signs of Heat Stress in Common douglas-fir
Symptoms
Common douglas-fir does not tolerate elevated temperatures well. When the temperature surpasses 70℉, it might shed a considerable number of leaves, and in extreme instances, the entire plant could wilt and perish.
Solutions
Cut off the sun-damaged and desiccated sections. Relocate the plant to an area offering protection from the midday and afternoon sun, or employ a shade cloth for cover. Hydrate the plant in the morning and evening to maintain soil moisture.
