why do the flowers fall off my camellia bush
The flowers come into full bloom and almost immediately fall to the ground.
Certified GKH Gardening Expert
Sounds like it may be a thrip problem. They often attack the base of flowers, causing them to fall when in bud or right after bloom. This article may help:
It may also be an environmental issue, like too little water or too much water. Check the soil and make sure that it is not too wet or dry.