Multiflora is highly susceptible to chlorosis, the lack of iron (and sometimes nitrogen). The most common cause here is the alkalinity of our soil and water. If for any reason, the plant was deprived of either of those nutrients, or the temps were just off enough when the bud was formed, it's going to be lighter colored. I frequently had to heavily amend the soil to acidify it to keep my heavily multiflora based roses their right colors. Many other types are also susceptible to the issue. I had chronic chlorosis (and light colored flowers and foliage) on Blue Mist, Reine des Violettes and a number of others for a long time in the old Newhall garden. Now, I just don't grow them if they have the issue. A client has Gartendirektor Otto Linne which FREQUENTLY throws chlorotic canes and nearly white flowers. I told her if it offends her, cut it off. Otherwise, leave it alone and once the appropriate nutrients and temps arrive together, it will green up. Kim

EVS is very shade tolerant, but more sun would help it rebloom. It does rebloom sporadically and has a pretty good fall show, but it is not continuous. High heat, as with most roses, puts a brake on bloom production. I'd give it some afternoon shade.

I posted photos of EvS (I misspelled "Excellenz") along with a link to a slide show over in the Roses Gallery. Link to thread below. Here is a link that might be useful: Excellent (sic) von Schubert

We cannot be sure if any of the plants sold as GOL and EVS are properly named. Lambert's own catalog described GOL: Gartendirektor Otto Linne (P. Lambert 1936). (Polyanthaform and size). Blooms dark carmine-pink on yellowish-white base, edges darker, in pyramidal trusses up to 30, well double. Vigorous plant, bushy, 60/80 cm high, upright, floriferous until frost; glossy, leathery foliage, firm, resistant; strong wood, well thorny. Very hardy. (Robin Hood X Rud. Kluis). Looking at the shots on HMF, I'd say there are at least three different cultivars being sold under the name of Gartendirektor Otto Linne. EVS is just as messed up. Rozenlexikon describes Excellenz von Schubert: von Schubert, Excellenz (multiflora, Lambertiana) Lambert 1909; M.N. Levavasseur X Druschki; deep carmine-pink, medium-size, well double, dense clusters of 5-20, floriferous, repeats, many thorns, long branches, growth 7/10, upright, bushy, 1,50m., Sangerhausen The lovely mauvey, arching, scented rose I grow under the name of EVS is neither deep carmine-pink nor thorny. The biggest problem is that multiple cultivars are in commerce under these names, and we poor slobs who want to grow one or the other have to do detailed research know what we're getting.