yellowing gardenia

yellowing gardenia

why would my gardenia be turning yellow? I trimmed it a few weeks ago and the new growth is fine but the tops of the old stuff is yellowing. It has full sun most of the day except the first few hours in the morning. I remember feeding it azalea food last fall because I was told that the food was acid which is what gardenias like.
hi! long while.. another ID

hi! long while.. another ID

Garden candy…

Garden candy…

Sad, sad bougainvillea and coleus

Sad, sad bougainvillea and coleus

Complete mystery…

Complete mystery…

delurking post

delurking post

Magic Carpet Spirea

Magic Carpet Spirea