Azalea Flower Disease. The best way to protect the plant from fungal diseases is by spraying it with a fungicide starting late spring until mid-June every two to three weeks. Azalea and rhododendron flowers can be affected by this disease.
This is a fungal disease that affects flowers within a day of contraction which is why flowers may be healthy one day and brown the next. Azalea and rhododendron flowers can be affected by this disease. Apply a fungicide to protect plants.
Monday 9 June 2014 - 936am.
29072016 However most florist azaleas are susceptible to a number of diseases but little attention has been paid to their resistancesusceptibility through breeding. For further information please refer to the Cornell University fact sheet. Azalea Gall Azalea gall commonly occurs in early spring on new leaf growth. Dead flowers turn brown and cling to the plants instead of falling to the ground.