Darmera peltata bloom
Generally most of the perennials listed here are hardy to zone 7 with no winter protection. Obviously people who live in zones colder could just lift and store their plants but compromise in size would result. Actually I have found people who live in colder climates are far better at protecting their plants than people who live on the edges of hardiness. They tend to be a bit complacent where as the zone 5 person knows its going to get cold and if they do not do something they will be re-purchasing the next year.
A few safe rules would be, the larger the leaves the more water and nitrogen.
The larger leaves would look best away from very hot western afternoon sun.
Agapanthus africanus 'Blue Heaven' (P.P. 14989) (zones 7-9 height to 36 ") A new introduction from Holland which raises the bar in blue flowered Agapanthus breeding. Boasting large blue flowers on 36 inch stems in not that unusual BUT re-blooming from June thru September!
Price= $15.00 :)
Agapanthus africanus 'Purple Cloud' (zones 7-9 height to 60 ") A rare variety of African lilly with purple-black flower buds which open mid-summer forming weeping purple-blue flowers on 5 foot tall stems.
Price= $15.00Agapanthus africanus 'White Heaven' (P.P. 15811) (zones 7-9 height to 48 ") Extremely large pure white flowers -up to 10 inches- reaching up to 48 inches above the mound of glossy green leaves.
Price= $15.00 :)
Darmara peltata (zones 5-9 height to 6') A native to the Pacific Northwest. In early spring the deeply lobed leaves emerge just before fairly tall pink flower spikes. Leaves up to 24 inches across. Sun or part shade.
Darmara peltata "Nana" (zones 5-9 height to 4') Do Not have space for the larger form? Same flowers, quite large leaves but only getting to about 4 feet. In early spring the deeply lobed leaves emerge just before fairly tall pink flower spikes. Leaves up to 20 inches across. Sun or part shade.