Have your lighting conditions changed? I ask this because I struggled with the same problem until I figured out that some of the windows in my house get far less light as Spring turns into Summer and my trees leaf out. Unfortunately, it can be impossible to know how many hours of natural light a day an orchid is getting unless you are there all the time to observe.Hello! I have 2 NOID oncidiums which both developed new growth in late March, only to have the growth spurt abruptly stop about a month ago.
This depends on your watering habits. Clay dries out quicker than plastic, so you have to water more often, but some people prefer the look of clay pots. The way I get around this problem is to grow in plastic pots inside of clay cachepots. How many drainage holes/slits to look for in a pot also depends on your watering habits. If you are inclined to overwater, the more holes/slits the better. Lja can tell you the best potting medium to use. Mine seem to be happy in medium bark with styrofoam peanuts on the bottom to facilate drainage and a little sphagnum on top to keep the aerial roots moist, but I'm only growing a few, so I'm far from an oncidium expert.1) What kind of pot should I use for these plants? Do I have to use the type with the slits or can I use the standard plastic pots with the drainage holes on the side?