Potassium Deficiency

Visual Symptoms:

Initial symptoms developed as a yellowing of the leaf margin, especially the saw-tooth of the leaflets, on the lower and older foliage. As symptoms progressed, the marginal yellowing became more pronounced and intensified on the older leaves, expanding inward toward the midrib. In advanced symptoms, the leaflet margins yellowed, and some regions of tan necrosis developed, especially along the saw-tooth margin of the leaflets (Cockson et al., 2019).

Additional Information:

Characterization of Nutrient Disorders of Cannabis sativa