Q. I have a beautiful orchid tree (Bauhinia purpurea) with dark red blooms. Do I propagate it by air layering? J.G., Bellaire A. You can propagate from seed. Collect the pods as they're about to split ...

Some need just a tiny amount of sun and water to bloom. Others flaunt their colorful petals in full sun even if they're in a ditch. A select few bloom only when secured to another, more stable plant.

Add articles to your saved list and come back to them any time. Scientists from around the world have gathered in Costa Rica to exchange ideas on ways to make sure orchids, among the world's most ...