Geraniaceae

Native to Southern Africa, these plants have been introduced to many subtropical and tropical regions globally. They thrive in climates where frost is rare. The botanical structure consists of succulent-like stems and distinctively veined, often aromatic leaves. The inflorescences appear in umbels, offering a wide range of colors that make the species highly desirable for both agriculture and horticulture.

The agronomy of Pelargonium requires well-draining, nutrient-rich soil and full sun exposure. In greenhouse production, it is crucial to maintain proper air circulation to prevent moisture-related issues. The plant is drought-tolerant once established, but optimal yield for oil production requires consistent irrigation and balanced fertilization, focusing on phosphorus and potassium to encourage robust growth and flowering.

Industrially, Pelargonium is cultivated to extract geranium oil, which is a key ingredient in luxury perfumes and skin care products. Beyond extraction, its commercial utility is rooted in the nursery industry, where it ranks among the top bedding and container plants worldwide due to its resilience, visual appeal, and long flowering season.

Key phytosanitary threats include Botrytis cinerea (gray mold) and Pythium (root rot), typically exacerbated by high humidity. Major insect pests include whiteflies, aphids, and spider mites. Effective management involves integrated pest management (IPM) practices, including the use of biological controls, regular monitoring, and climate control in enclosed environments.

• Propagation: Stem cuttings (most common) or seeds.
• Growing Medium: Porous, peat-based soil with excellent drainage.
• Light Requirement: Full sun to partial shade.
• Fertilization: Balanced NPK fertilizer during the active growing season.