Hello and welcome. If this is the same tree you posted about earlier I am fairly certain it is not an umbrella tree, or Schefflera. Unfortunately I am unable to identify it from the picture you provided. Can you possibly post a clearer shot? Perhaps several with at least one closeup of the foliage. I have a feeling that it may be an Azalea but that is only the vaguest of impressions at this point.
Most growers do not use the immersion technique on a regular basis, certainly not everyday. Get a thin wooden skewer or chopstick and place it in the soil to the bottom of the pot. Every day remove the skewer and check it for moisture, if it is still wet do not water. water only as the soil soil approaches dryness. Don't let it go completely dry but don't keep it constantly wet either.
If you are keeping it in the location you pictured that may be part of the problem as well. Unless you have a bright window or employ supplemental lighting, the lighting inside your home is too dim for most plants to do well.
I keep everything, even tropicals, outside when the weather is warm enough. I have just moved my things out the other day so I assume the weather is settled in your location. If possible, consider moving it outside to a location that gets some sun in the morning and some shade in the afternoon. After you ID it and if it recovers you can look for a more suitable location.
Last edited by Gnome
on Fri May 08, 2009 12:36 am, edited 1 time in total.