Spiral ginger are flowering perennials that are characterized by their spiraling stems and spirally arranged leaves, which is how they got their common name. This is the main feature that differ costus from true gingers (Zingiber spp.). These plants are widely spread throughout Asia, Africa, and the Americas, but are restricted to tropical and subtropical areas. Some of the species in the genus are important food sources for rare caterpillars, such as the restricted demon *(Notocrypta curvifascia).*
Water:
Costus thrives in high humidity and requires consistently moist soil, with weekly watering to prevent drought stress. As an indoor ornamental, it benefits from placements in humid areas like bathrooms or kitchens, mimicking its tropical origins.
Propagation:
Propagation methods for costus involve division and stem cuttings, requiring warmth, high humidity, and well-drained soil. Indirect sunlight is crucial during rooting. The process includes using a healthy stem, applying rooting hormone, and maintaining temperatures around 21°C (70°F) until establishment.
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