Pelargonien

Pelargonien, known in horticulture as pelargoniums or geraniums, are a genus of flowering plants in the family Geraniaceae. Native to southern Africa, they have become widely cultivated as ornamentals for borders, containers, and indoor pots. The term geranium is often used in everyday gardening to refer to Pelargonium hybrids, while true Geranium species are referred to as cranesbills.

Most cultivated pelargoniums fall into several groups: zonal pelargoniums (Pelargonium × hortorum) with rounded leaves and bold colored flowers, ivy-leaved pelargoniums (Pelargonium peltatum) with trailing stems and lobed leaves, regal pelargoniums (Pelargonium × domesticum) grown for large, showy blossoms, and scented pelargoniums (such as P. graveolens) valued for aromatic leaves and essential oils. They vary in growth habit from compact pots to trailing climbers.

Care: They prefer bright light and temperatures that do not fall below freezing. Use well-draining soil, regular watering that allows the topsoil to dry slightly between waterings, and occasional feeding with a balanced fertilizer during the growing season. Pinching and deadheading promote bushier growth and longer flowering. They are typically grown as annuals in cool climates, with many overwintered indoors or in heated conservatories.

Propagation and use: Propagation is commonly by stem cuttings taken in spring or summer. Watch for pests such as aphids, whiteflies, and spider mites, and for diseases like powdery mildew and botrytis in humid conditions. Pelargonien are popular for their varied forms, long flowering period, and, in scented varieties, fragrance used in perfumery and aromatherapy.