About 13years ago I inherited my hoya from my Dad. Its positioned out of direct sun in a warm room. Dad got plenty of flowers. I've had none. A cutting from my plant flowered for a friend!!!Asking succesful growers for tips has proved unsuccessful. Last year in desperation I divided it and gave it a good prune. It is positioned out of direct sun in a warm room. I feed it with orchid food. I don't want to bin it but... ! Any ideas please? Many thanks.