Ideal Temperature for Johnson grass
Images of Johnson grass
Indications of Low Temperature in Johnson grass
Symptoms
Johnson grass tolerates cold well and flourishes optimally when temperatures exceed 75℉. In winter, it needs to stay above 55℉. If temperatures drop below 50℉, while winter changes might not be obvious, spring could see reduced or absent sprouting.
Solutions
In spring, remove any sections that did not sprout.
Indications of High Temperature in Johnson grass
Symptoms
In summer, Johnson grass should be maintained below 90℉. When temperatures surpass 100℉, the plant's leaves might lighten, curl easily, suffer sunburn, and in extreme cases, 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 fabric. Water the plant in the morning and evening to maintain soil moisture.
