You have great plants already and a very nice tidy border in those logs that I envy. I'm wondering two things - do you have enough space for a rose to spread out, and how much sun does this bed get? If the heucheras are happy, then it's no more than part sun and you'd want to go with a hardy shrub or hybrid musk. Also, it doesn't look much more than 2 feet wide, which might limit you to the small shrubs or even minis, which sort of rules out most of the hybrid musks I can think of. If I were you, I'd look at some of the smaller Easy Elegance shrubs, if you want year-round color with guaranteed winter survival in zone 5 and aren't fussy about individual flower form. I've had good results from Sunrise Sunset (pink-orange blend), which stays around 2-3' for me, or maybe Paint the Town (reddish blooms). You'd have room for one of the "drift" roses, and they can handle part shade and might drape over the edges of those logs nicely. For more height, you could do one of the shorter Kordes roses. Bushier ones might be Elmshorn (below) or Eutin, which was apparently the Knockout of its day and is a tough ever-blooming low bush. For a taller compact Kordes, Floral Fairy Tale stays short for me, less than 3' tall (picture below). Otherwise, there are wide varieties of minis that would fit in nicely around these heuchera and you could winter protect their bases with some chopped leaves if you're unsure of their exact hardiness in the first year. Cynthia

Creel's Gold St John's Wort fits your size (I have no idea about moisture though!!!) Here's what Gardenhood has to say about it... A selection of St. Johns Wort with lovely, fine textured semi-evergreen foliage. Grows to 3 ½ x 3 ½Â. Covered with small yellow flowers in late summerÂgreat for attracting butterflies! Grow in full to partial sun.

Without having looked previously at the earlier posts, seeing only the pics, the first thing I thought was that it's a shame, but the tupidanthus would have to go. If it were me, it would break my heart to do so because I also try to not take out anything living and the green of the tree looks so nice there, gives 'life' to the setting. Wow...not only full afternoon sun, but also reflected heat in a narrow space. That's a tough one. I would want 'green and living' there, but something low for the same reasons as given above. I know you seem to like clean lines and don't want to clutter up the look at that spot, but I would be tempted to go with a lower growing plant and do some kind of metal (or wood) sculpture to give height there at that corner rather than a tall plant. Something clean lined that would not compete with the look of the house

Saucer magnolia, Magnolia x soulangeana.