My current favorite companion plant for my roses is geranium "Johnson's Blue" (pictured). I am not currently growing clematis with my roses, but a clematis growing up through a large shrub or climbing rose can be very beautiful. Selection of companion plants depends on climate. The following are just a few that I have used effectively with my roses in Southern California: snapdragons (the tall kinds), pelargonium "angel geranium", catmint, agapanthus (the short kinds), anchusa "Alkanet", lobelia erinus, marguerites and alstroemeria. There are countless additional possibilities. I would recommend experimenting with plants that look like they might provide good color, texture and height contrast.

In Florida you should look at society garlic (Tulbaghia violacea) and drumstick allium (A. sphaerocephalum). There also are some native species from Texas in cultivation like A. drummondi, and A. texanum, but I don't know much about them personally.

With the exception of the hydrangeas, all of those are full sun plants and a bit on the droughty side as well. Once the trees grow and fill in more - and that often happens faster than you expect - they will be casting their own shade and those plants will not be very happy. And you do not want to plant something now that will have to be dug up and moved later, disturbing the maple roots when you do. And while it is a totally personal observation, those plants just don't reflect the character of the JM's very well. kaitain4's suggestions are much more in character and kind of the typical JM accompaniments. You could also add hellebores or epimediums to the mix as well.

I'm gardening in Santa Monica and going for a more drought tolerant garden while keeping roses in the mix. I haven't been checking the forums for a bit and I'm sure I'll echo many recommendations already made, but I like the following so far: Lavenders of all sort, but especially Fern-leafed in tighter spots. Eschscholzia in a myriad of colors. Platystemon californicus. Annie's carries this absolutely charming California native. It has lovely light yellow flowers that close up at night. It looks great right now for me. I really love this annual/companion. It's definitely for the front of the border. Penstemons in darker purples, blues -Marguerite BOP amongst others- and red. They can fill out nicely. Salvia of all sorts. I like gregii hybrids for sunnier spots, but check out the selection at Annie's. It is terrific! Cerinthe. I love the blue-grey-green foliage and purple flowers. It's very easy from seed. Centranthus or Jupiter's Beard in pink/red and white is all over my garden. It spreads almost to the point of invasiveness, but it looks good with little water and the volunteers are easy to rip out. I like the way certain ornamental grasses blend with roses. Smaller Pennisetum, Calmagrostis, Bouteloua, and Deschampsia varieties can be blended with roses and other drought tolerant plants fairly easily. Nicotiana mutabilis is very low maintenance and low-water for me. It looks great Spring-Fall with tall stalks of multi-colored flowers. Limonium -statice or sea-lavender- comes in all sorts of colors besides purple and is very easy to maintain with little water. I like the apricot and white varieties a lot. I really enjoy variegated Euphorbias like 'Blue Glacier' and 'Tasmanian Tiger.' They can lend much needed foliage interest and form very shapely mounds. Columbines fare a bit better in light shade for me, but I love to grow them. I have a Rosa rugosa alba in light shade under planted with black/dark purple columbines that looks wonderful right now. Eriogonum or buckwheat can be mixed at the front of drought tolerant borders with great success. I like E. latifolium and E. grande v. rubescens a lot. The former has terrific light pink flowers if I recall correctly and the latter red. Some dwarf Correa varieties look great with roses. The common name is Australian Fuschia. They bloom in winter/spring and require little water. Consider South African bulbs that go dormant in the summer when there's little or no rain here anyways. Ixia, Aristea, Ferraria, species Gladiolus, and others can be unbelievably beautiful and very drought tolerant. Lewisia looks terrific in Spring in containers or in areas where it won't be covered up since it is quite short. Check out Annie's Annuals in Richmond for plenty of ideas if you haven't. I can't tell you how many wonderful plants I've seen on their site that I wish I could have ordered without thinking about it. Being able to go in person removes the need to save on shipping and you can see their demo gardens with mature examples of most of their offerings. Jay