weeble

It looks like a pretty typical florist azalea (at least thats what we call them here .)

Azaleas generally do loose some leaves this time of year, but it does sound like something more is going on with yours. I have a bunch that I repotted this summer that went through a pissed-off phase just like yours is now, and came out of it fine. Your leaves that are green look perky and happy, not floppy-dead, so it looks to me like this guy can come out of this if you get it figured out.

First, what heat and temperature zones are you in? It'll help us tell you what would be best for your tree. Azaleas are an outdoor plant, but I dont think they are terribly cold resistant. Even though the florist azaleas are often sold as 'indoor' plants they never do as well indoors as outside here where azaleas grow wild.

Second, the general "All purpose" soil mix you are using is not really designed for azaleas. They are an acid soil loving plant, and you should use a soil mix that does NOT contain LIME. I suspect that has as much to do with your azalea's declining health as being stuck indoors.

Third, check your windowsill temperature, your plant may be getting 'cooked' in the few hours of sunlight or chilled at night. The older leaves almost look sunburnt. Remember the amount of sun a windowsill recieves can change drastically depending on time of year.

If you have any doubts about your watering, use the 'chopstick' test. Stick a chopstick or wooden dowel or popsicle stick into the soil, let it sit for a few minutes, then pull it out. If the stick is damp and bits of soil stick to it, you're fine, if its dry, its time to water.

I would recommend you use stop using the generic 'bonsai' fertilizer and vitamines and use Miracid or some other acid-loving-plant fertilizer to help your plant get through the winter. The vitamines are really not necessary on a regular basis, but would help with a stressed plant such as after a transplant. There are many good brands of acid-lover fertilizer with micronutrients out there, a lot cheaper than the 'bonsai' fertilizer you've got.

Then in spring repot into a bonsai mix that has sphagnum moss/peat but no lime, or add more sphagnum moss to your mix. The azaleas I repotted came out of straight peat, which seems to be the potting medium of choice for the florist azaleas they crank out around here. You may have to bite the bullet and tease that rootball apart when you do transplant.

Hope that helps

Maryjane
Aka Weeble