Q: I have a potted gardenia in my conservatory. It's one of my favorite plants, mainly for its beautiful, scented flowers.

The problem of yellow leaves on plants – although common – can be caused by a number of reasons. Here, an expert outlines four of the main ones. As a result, it’s not uncommon for plants to ...

But even if you think you get everything right, from the soil pH and drainage to the amount of water and fertilizer you give your gardenia, some leaves may start turning yellow. Here, we'll look ...