Calcium (Ca) -Macro Nutrient and an Immobile element.
If symptoms appear on new leaves, the problems could related to iron, zinc, manganese, copper, boron, calcium, or sulfur.
Deficiency: First visible in newer growth, leaf tips will die, tips may curl, growth is stunted. there will be a weakness in stems/branches. underdeveloped roots, and bacteria problems can arise. *can be cuased by too much potassium/nitrogen* calcium deficiency is commonly mistaken for over ferting. its key to notice in these pics that early stages of deficiency appear in the serrated edges/tips of the leaves, but its not just a death/necrosis, its a small circular spots of death, not just burn marks. young leaves will develop dwarfing, a strap-like shape, and shoots stop growing and thicken.
When the plant is deficient in calcium, the soil of the plant is becoming too acidic.
Lack of calcium in the soil results in the soil becoming too acid. This
leads to Mg or Fe deficiency or very slow stunted growth. Treat by
foliar feeding with one teaspoon of dolomatic lime per quart of water
until condition improves.
Pictures 1-2 shows calcium deficiencies. First one shows late, 2nd one shows early development.