Houseplant Q&A: What is wrong with my orchid?

It may be that the flowers have dried up and dropped off, or the leaves have turned yellow. What am I doing wrong?

Is your orchid struggling? Picture: Alamy/PA

Is that elegant orchid you bought recently looking tired?

It may be that the flowers have dried up and dropped off, or the previously rich green leaves have turned yellow, while aerial roots are cascading over the top of the pot. So, what are you doing wrong?