Ideal Temperature for Greater periwinkle
Images of Greater periwinkle
Signs of Cold Stress in Greater periwinkle
Symptoms
Greater periwinkle tolerates cold moderately and flourishes best when temperatures exceed 65℉. In winter, maintain temperatures above 55℉. If the temperature drops below 40℉, leaves might begin to sag. Mild cases can recover, but severe cases lead to wilting and eventual leaf drop.
Solutions
Remove frost-damaged sections. Before future cold spells, cover the plant with materials like non-woven fabric or cloth, and build a windbreak to shield it from cold gusts.
Signs of Heat Stress in Greater periwinkle
Symptoms
In summer, Greater periwinkle should be kept below 75℉. When temperatures surpass 85℉, leaf color fades, leaf tips may dry and shrivel, leaves might curl, and the plant becomes more prone to sunburn.
Solutions
Cut off any sunburned and desiccated parts. Relocate the plant to a spot offering shade from the midday and afternoon sun, or use a shade cloth for protection. Water the plant in the morning and evening to maintain soil moisture.
