Why don't you prune it back by half, dig it up and put it into a very large planter, place it in an area where there's part shade. The cooler site will do it better for flowering, and also, in a cooler spot you won't be watering it twice a day.

Next year you'll be much better as from your post I read that you know what to do to increase your success.

trudi d,

Thanks for the advice. It's pretty well shaded right now but I'm thinking that I might take your advice to put it in a planter and move it to a sunnier area once the temp cools down.

It's been in this spot for several months now -- will it still transplant well?

I'd transplant it on an overcast day, and certainly if you have several rainy days coming it would be a good idea to to do the transplanting at that start of them. Heat and sun can certainly stress plants during transplant, so cooler and wetter days will be a boon.

Cut back the plant by half, you could do more but no more than two-thirds taken off the top. When you transplant it use an amended soil, if you prefer organic methods use something that suits you, otherwise a Miracle Grow type product is fine--for containers there's one with water retention capacity, that's fine too. Once the plant is potted and well watered delay feeding until you see new growth (that is, of course, if you haven't used an enriched soil.) Enriched potting soils have slow-to-release nutrients and with my own eyes, I haven't seen them cause an imbalance which would foster too much top growth instead much flowering.

Keep an eye on the planter over the next week or two and maintain soil moisture, damp but not muddy is what you want. If you're not too rough, you downsize the top-growth, give light food (as needed) and adequate water you should have a success.

Good luck!

T