Reiger begonia, Brown flowers
I bought a Reiger begonia about 3 weeks ago and it had alot of flowers, but alot of the flowers have started turning brown and the flowers are falling off. There are new ones tha ti see forming, is this normal for the flowers to fall off so suddenly or could it be because of a cold draft or over watering? I water it once the soil is semi moist or almost dry. thanks.