A friend reminded me that about 20 years or so ago I ordered an "exotic" new plant from Logees (the house plant people) called Angelonia and that she and I had trialed them in containers and they were not ever blooming then either. Can't tell you what variety we had back then, but this new batch is tagged 'Archangle Purple'. It was planted the first week of May and was all but through blooming by August. There have been a few individual flowers, but the mass effect was gone by then. I haven't pulled them yet just in case they do something spectacular when cooler weather arrives........But speaking of different colors in a series doing better then others, I've noticed that different colors of Calibrochoa also fare differently. The orange Calibrochoa usually lasts until Halloween here. That's just when you want a great orange accent flower and I consider it money well spent on an annual....Cleome is a nice plant, but I can't get it to grow where I want it to grow. However, around the compost bin where I pitched the old plants years and years ago it is prolific.......Thanks again for the comments on the Angelonia. Hope others come up with some other plants that can take summer heat...........Maryl
