Calcium is the structural glue of plant cells — it's a key component of cell walls, giving tissue its rigidity and integrity. It also plays a critical signalling role in how plants respond to stress.
Validated against standard laboratory soil test values by Kerala Agricultural University, College of Agriculture, Vellayani.
In tomatoes and peppers, the classic sign is dark, sunken patches at the bottom of the fruit — a direct calcium transport failure.
Young leaves and growing tips become deformed, curled, or develop necrotic (dead) edges.
Tissue becomes soft and prone to collapse, making produce more susceptible to bruising and rot during storage.
Root tips, which rely heavily on calcium, can die back, limiting the root system's expansion.
Illustrative comparison — actual symptom severity varies by crop species, growth stage, and the presence of compounding deficiencies.