How deep is an azalea bush's roots? Can I dig a mature one out to replant?
Their root systems are not too extensive and transplanting can be done successfully with proper care. While it is generally best to do this in fall, you can also transplant the shrubs in spring as long as the weather where you are is not too hot. Just make sure to dig up as much of the root system as possible and place it in a suitable location. Also, water the azalea well after transplanting. It may help to trim the shrub back too, though this may reduce blooming next season but will help reduce the chance of shock.
There is a white flaky substance on the branches of my azaleas that seems to be killing the branches they are on. I have looked online and have not seen anything described that resembles what I have. Is this something I need to keep from spreading to other plants? Should I be thinking about getting rid of these azaleas and starting out fresh? If I do get rid of the azaleas, do I need to worry about the soil being infected?
It sounds like it may be lichen, which is not harmful to the plants, though it does grow on plants that are stressed. However, if you want to get rid of it or simply want more info, here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/fungus-lichen/treatment-tree-lichen.htm
My azalea has tons of small, silvery white spots all over the leaves. I don't see any insects on the leaves. Is this some kind of fungus or disease?
It may be ozone damage. Ozone can be pulled down during a storm and react with the environment down here leaving silver spots. Here is more information:
http://www.aces.edu/pubs/docs/A/ANR-0940/ANR-0940.pdf
I started cutting back two azaleas and discovered how much dead wood there was. I then just decided to cut them down to almost the stump. Have I destroyed these plants?
Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/shrubs/azalea/pruning-azaleas.htm
I have a peach colored azalea and I need to prune it back, but I am wondering if I can root the cuttings. I would love to buy some more of this color; however, where I live they only get about 3 or 4 up in my area a year and I missed the delivery day. Thank you for your time.
Yes, you can take cuttings from them to make more. Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/trees/tgen/how-to-root-cuttings-from-various-shrubs-bushes-and-trees.htm
I have a beauitful pink azalea that is huge. It is about seven years old and has been so healthy. This spring I noticed the leaves on the center branches were all wilted and dried up. I cut them off but now it appears I am losing the rest of this huge bush. What could be wrong? I live in OK and have grown Azaleas for years with no problems. This was the largest and prettiest of them all. Do you know what could have caused me to lose this bush?
Are the leaves yellowing first or spotting before they turn brown?
It sounds at the surface like it may be a fungus, but it may also be root rot. This article will describe the symptoms of root rot and you can see if that fits:
https://www.gardeningknowhow.com/plant-problems/disease/root-rot-in-garden-plants.htm
If you do not think it is root rot, then treat the plant with a fungicide.
Several of my over 40-year-old, large Azalea bushes have experienced a random dying off small branches on several sides of the bushes starting in the spring. I originally thought it was frost/snow damage and cut the dead branches back. It's summer now and new sections are dying off in the same manner. I was using a two gallon spray can with insect spray and witnessed a group of 20+ insects fly out of the bushes. But the random dying of small branches continues. What can I do? I never experienced this before and at this time it's affecting 2 of my 20 azaleas, and the ones which over the years have grown together.
It sounds like it may be Twig Blight. Check under the bark of the dead branches for a red dicoloration. If you find this, it is Twig Blight and all the affected branches must be removed,making cuts a few inches below discoloration, and destroyed to have any chance of saving the bushes.