Since you want a dense hedge, you should start pruning before the height you want is reached, so I would severely shorten back, by half or more, any long shoots. However, since you want to give any new growth subsequent to pruning time to harden off before winter, I might, depending on where you are located, and when your first hard freeze is usually (and on when your area stays frozen), wait to do my pruning until spring. You may get some winter die-back anyway, so better to do your shaping in the spring, when you can tell what is dead and what is growing. Next year, I would do any trimming of long shoots as I see them, keeping to your rough shape while allowing for growth. It may be "slower" to establish the shape roughly now, and keep it roughly trimmed, but it will grow up much more densely than if you let shoots grow to the height you want and then cut them. I would do a lightish clipping several times a season, to establish and keep the shape you want. Just remember that hedges need to be narrower at their tops than at their bases - shaded branches are MUCH more apt to die out on you. The ultimate shape can be with a square top or with a rounded top, but the sides should slant down to the ground, growing wider as they go - it can be a very slight taper, but it MUST taper.

Hey Dax, you're saying no problem for any of the three right? I tell you I am way too inpatient. I went to look at the Concolors and they were too nice to pass up.

Thanks, Arbo. I have been to Mahoney's in Winchester and a number of other nurseries. I've seen other Torenias but not this cultivar, which is so superior, IMO. It's packed with flowers all season, once the warm weather arrives--doesn't flower heavily in our current cold, dark spell. I have not had great luck calling nurseries in the busy season. For example, I once called Lake Street--Lake Street!--asking for a certain kind of Forsythia. Thought that was a plant even non-gardeners would recognize. The girl who answered the phone said, "Is that a hanging basket?" Finding the one person who knows--and is the busiest of all--has not proved to be a fruitful exercise, alas. If I find Summer Wave Blue, I will let you know, for sure. Thank you for your kind offer re the plant swap but on June 3 I will be in ENGLAND--yayy! Drooling over some of their gardens. Both inspiring and depressing.

Take a look at "Green icon" by Doorakian 2012. Mid season Diploid. It's all green http://www.daylilies.org/DaylilyDB/detail.php?id=165955&name=Green%20Icon