Q: I have a potted gardenia in my conservatory. It's one of my favorite plants, mainly for its beautiful, scented flowers. However, some of the lush green leaves have recently turned yellow ...

Gardenia jasminoides ... Use a balanced, acid-loving plant fertilizer to maintain nutrient levels. Iron deficiency is another ...

Gardenia plants were also long prized among the Chinese for the yellow dye from their seeds. In the 1980s, Japanese scientists discovered a blue dye derived from a fruit, also produced by Gardenia ...