Handsome trellis and I think you've chosen a good spot for it. Your front beds are lovely as well. Will you be widening the back beds so that they have similar depth to them? There are two issues with climbing hydrangea in this setting. One is the enormous size that Mad G referred to. The other is that it holds on via aerial roots that once detached for painting won't readily reattach themselves and will also leave residue on the trellis that's difficult to remove. A summer blooming clematis (or 2 or 3) would look wonderful on the trellis, but won't easily grab onto such large diameter pieces of wood since it's the leaf stems/petioles that wrap to help it climb. You would want to give it some netting or twine or fishing line woven loosely through the slats to give it something to grab onto. Otherwise you'd be spending a lot of time guiding the clematis. The summer blooming clems (type 3) are pruned to about a foot (1 or 2 leaf nodes) during the winter, so you could easily paint before the clematis did too much growing. The type 2 clems bloom on old wood as well as new vines, so if you pruned them hard early in the season, you'd lose the first bloom, but get a good second bloom. I think a noninvasive honeysuckle would climb it since the stems twine and weave, though it might need a bit of help initially to start it weaving through the lattice. I have a relatively young Lonicera sempervirens 'Major Wheeler' that has red flowers that are popular with insects and hummingbirds.

Thanks Ann and Claire! I have been trying various annual vines to see what I like. The first year was the "Heavenly Blue" morning glories. They are beautiful, but seemed to take forever to climb and get established and bloom. Last year I planted the yellow variety of Thunbergia alata (Black-eyed-Susan vine) and the results were much more rewarding. The color went well with the warm tones of the stone wall. They bloomed fairly quickly and continued right up until frost. This year it's the Cardinal climber (Ipomoea). So far they have taken off like rockets. I'd like to plant some perennial vines, maybe clematis, but I'd want something that blooms all season. I know some clematis will perform well, but I'm not sure they'd do well in the midday sun there. Another interesting option might be Passion Flower (P. incarnata or some other hardy hybrid), but I don't see much posted here about these vines. Maybe people don't think about them much, or there hasn't been a lot of success.

Well luckily I don't have any boxes as of yet so the placement is always available to change. Looks like we're going to try 3 boxes and I can put them in any configuration. Would it be better off to do 3 in a line? Here's a aerial. Up is North so I'm currently planning on placing the 3 SFGs south of the house where they'll get the best light. To the east of the large lot is a high tree line but I can really choose to stagger them however I need to in this lot.

EG, I grew up with butterbeans growing up. We used post with wire between the post at the top and bottom then we ran twine or cardlacing up and down between the wires. Here in NC we can purchase bush butterbeans and pole beans. I would be happy to send you a pack if you are not able to get them where you are. My undle moved to Ohio back during the 70's and couldn't find pole butterbeans, he had someone from back home send him the seed for his garden. They are planted after the last frost, produce later than bush beans but produce more than the bush, they last until the frost kills them in the fall. We never considered bush beans, I never heard of them until now. I will plant bush beans so I can get the bean first. We folks here in NC fight for the first mess of butterbeans. LH