Q.Three Azalea Bushes With Issues, One Is Stunted And Limited In Blooms. Would Like To Use Organic Products To Rectify.
1st three pictures are of the worst of the 3 plants. Leaves are yellowed, dead branches in places, whitish spots and looks stunted with minimal blooms. Not sure if all from improper pruning from garden service (for all 3 plants) which have been left alone for about 2-3 years. Gets morning to mid afternoon sun and gets used coffee grounds, tea leaves and egg shells about 3 times during spring to fall. Last two pictures of plants show less blooms than usual, one has areas of black spots and one has white spots. These last two get minimal sun on north east side of house. I have a product called EcoSmart Organic Garden Insect Killer which I would like to use or something organic rather than the insecticides noted on-line that I looked up for thee issues. Is my first plant salvageable?

Certified GKH Gardening Expert
Yes, you can use that insecticide in case it is mites or another pest or use Neem oil, which is nontoxic. It also could be the soil is not acidic enough so you may want to test your pH. Also use a fertilizer for azaleas, rhododendrons.
Prune out the dead wood and rake up all the dropped leaves, so as not to spread a disease.
https://www.gardeningknowhow.com/ornamental/shrubs/azalea/common-azalea-problems.htm
https://www.gardeningknowhow.com/ornamental/shrubs/azalea/azalea-branches-dying.htm