You named it yourself, "Limelight". Also Annabelle is lime green at first then turns white. Lots of Oak Leaf types here too. Earth Touch Garden Center on Whitesburg in Hsv. has all sorts.

You must have Weigela that aren't suited for zone 5. I have multiple cultivars that do fine in my yard. Pink Poppet is actually ok to zone 3. The fiesta forsythia will have the spring show, but the foilage is the biggest bang for the buck. Will show well with the other plants. But I know there has to be something else out there with a little more interest..ie fall color. I like the idea of the long white rose bloom but the foilage will look "blendy" with the other plants. Knockouts are a hit or miss in zone 4. My quickfires were planted mid-summer so they didn't establish all that well this year because of an extremely dry August...should bounce back next spring. I have them in full sun and I didn't notice much of a fall color. I don't think they are really supposed to have any consistent fall color anyhow. I do like that the flowers hang on, they dimension to the plant.

Some of the "green" hydrangeas do not rebloom. They are Annabelle (note: it may very rarely throw limited blooms in early Fall when it so desires) and its cousins (Incrediball - larger blooms, etc), Limelight or Little Lime. The other white ones may turn somewhat green as the blooms age but there will also be a spill of pink/etc colors too, which I am guessing is not what you want. These will start green and turn white eventually. Less sun exposure will allow the green immature blooms to stay green longer. Some whites that rebloom like ES are: White Out, Blushing Bride (can have a touch of pink/blue on the sepals) and Peace (double blooms, may have a yellow tint sometimes). Lowes has carried White Out and Peace randomly in prior years. Not much selection in local nurseries yet though; too early in the season for that. Some of the white mopheads may temporarily show a tinge of yellow in blooms. Not sure what is all about myself. Paniculatas and oakleaf hydrangeas also bloom white but are not rebloomers. Except for Limelight and LL, most of these may fade from white to a shade of pink. Mme Emile Mouillere (serrated petals) and Sister Therese.(sometimes called Sister Teresa or Soeur Thérèse) are awesome white non-rebloomers... very nice, big shrubs, tough and reliable bloomers. The blooms fade to a mix of colors, not green only though. This post was edited by luis_pr on Fri, Mar 7, 14 at 5:43

I have covered my hydrangeas and some of my hostas with sheets the last two nights with no damage. However, now we have snow on top of everything and the temp. is forecasted for near 20 degrees tonight. I'm afraid we will lose some plants. I figure the hostas are easier to replace than the hydrangeas. Keep your fingers crossed.