Spiked Spiralflag, Red Button Ginger Origin: Tropical America Costus are easily distinguished from other commonly cultivated gingers because the leaves spiral around the main stem like a circular stairway. In fact they are called "spiral gingers". Sometimes Costus are still listed with other gingers in family Zingiberaceae, but generally they are accepted classified in a separate plant family, Costaceae, along with Dimerocostus, Monocostus and Tapeinochilos. Costus spicatus will grow in the sun if kept moist.
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It has tropical-looking foliage with leaves that spiral around the main stem. The leaves are up to 1 foot 30 cm long and up to 4 inches 10 cm wide. It produces a short red cone, from which red-orange flowers emerge one at a time. It flowers in spring and summer or year-round in tropical conditions.
Photo via pinterest. How to Grow and Care Costus fall into the tropical category, so if you do well with philodendrons and other tropical plants, you should be able to grow Costus without too much issue. If your plant starts to suffer from brown leaf margins, it most likely is being underwatered or exposed to cold drafts.
Try to raise the humidity and increase the water. Costus are susceptible to mealybugs and aphids. Keep a careful eye on your plants and inspect them to catch infestations early and treat them immediately. Severely infected plants should be discarded. If you want to keep it a manageable size, use this as an opportunity to divide the rhizome and refresh your potting soil, but keep it in the same size pot.
Some of the larger species can grow to 10 feet 3 m or more, so be aware of the potential size issue… — See more at: How to Grow and Care for Costus Origin.
Costus spicatus (Spiked Spiralflag Ginger)