pcmacd

Thank you for your reply.

I can't recall exactly what time of year it flowers (i'll start keeping records!), but it is after the nights have warmed to around 55 or more F. I know because when the fruit is ready to eat the days have gotten fairly warm; high eighties, because I remember delivering fruit to some friends on some absolutely beautiful, shorts and sandals days. We usually have a ~20 degree F temp swing night to day in the summertime here.

I have no images of the issues (duh.me) and discussed the fertilizer in the first post.

I fixed the heavy water problem in 2015; I thought that was likely it, and was disappointed when it happened again.. I just needs some hints as to what the issues might be. Low temperatures is not likely one of them.