Ideal Temperature for Black walnut
Images of Black walnut
Signs of Cold Stress in Black walnut
Symptoms
Black walnut tolerates cold well and flourishes optimally when temperatures exceed 60℉. In winter, it should be maintained above 55℉. If temperatures drop below 50℉, while winter changes might not be evident, branches can become fragile and parched by spring, with no new growth appearing.
Solutions
In spring, remove any dead branches that have not produced new foliage.
Signs of Heat Stress in Black walnut
Symptoms
In summer, Black walnut should be kept below 75℉. When temperatures surpass 85℉, the plant's leaves might lighten in hue, their tips could dry and shrivel, and the plant becomes more prone to sun damage.
Solutions
Remove the sun-damaged and desiccated portions. Relocate the plant to a spot offering protection from midday and afternoon sun, or use a shade cloth for cover. Water the plant in the morning and evening to maintain soil moisture.
