| There are several ways, depending on the type. If the newest leaves look smooth and green, for most types, that's a good sign. If you see aerial roots coming across the surface of the medium or poking up, that's good. If you see healthy roots entering the medium, or poking out the other end, that's good. With the most common type, the moth orchid or Phalaenopsis, noticing a little green or purple tip on the roots suggests that new root growth is taking place. And, of course, new leaves are proof positive that it's growing. Most orchids have cycles of growth, and many of them will go for months more or less just sitting there. -- Bill |