Phosphorus deficiency: what it is, how it occurs, and how to solve it

Phosphorus is relatively mobile in the plant, so symptoms usually appear on older leaves first, although overall development is also compromised.

Typical symptoms:
• Slow growth and stunted development.
• Older leaves with dull, dark green tones.
• Appearance of purple, reddish, or bluish pigmentation, especially on the undersides of leaves and stems.
• Poorly developed root system with few lateral roots.
• Delayed flowering and ripening.
• Small fruits and lower yield.

Phosphorus deficiency directly affects the plant's energy and vitality, making it weak and less able to withstand stress.

Developmental stages:
• Early: Older leaves with darker green than normal.
• Intermediate stage: Purple or reddish pigmentation on stems and veins.
• Advanced: Limited growth, short, and sparsely branched roots.
• Final: reduced flowering, poorly formed fruits and low productivity.