Hello-
Pls. I am stressing out over this problem. I live in Colorado Springs and now currently have all of my house plants secured inside until spring. They are all potted plants (palms,coleus, philadedrom, money tree,etc. I usually have great success however; to look at them you would never believe it! First of all, my apt has med- med high light and have my plants getting supplimental light from plant bulbs, next I have adjusted watering ensuring not to under/ over/ however; some of my plants lost their leaves, start to bud again then they die/ stems remain green so I know they are not dead,trying to figure out why this is happening/ could it be our tap water, lack of humidity( I do spray mist them every other day) house temp is about 68(20c)however there are some drafts but not of the freezing nature in fact our day time temps ave near 50(10c) lows are cold however 20. Pls. any insight!
Thanks-
Tim

Check for any pest in and around the leaves, if one has been infested, the other might be too.
If you had these plants outside all summer, they would need to get adjusted to the lower light and humidity. Problems can happen from moving plants from one location to another, too much heat, dry air, over-watering or dry soil/roots can contribute to bud drop, leaf dryness and leaf drop.
Make sure that the plants are in a comfortable temperature all of the time, most tropicals prefer the same temperatures as we do, in and around the 65-75 range without any cold drafts.If we are cold, they are too.
Make sure they are all in the correct light and watered correctly but not over-watered, water them thoroughly and not again until close to dry and don't feed, wait for warmer weather and new growth.

Misting plants really dries too fast to do much good except clkeep the leaves clean, so be careful, If the conditions are just right, misting can cause mold/fungus to grow on the leaves and in the soil.