Sorrel, tarragon, skirret should do well for you, as well as the others mentioned above. As for ornamentals, day lilies, siberian iris, own root roses, hardy geraniums and peonies should give you colour and fragrance. (Up until this past winter, I would have added quite a few more - dianthus, nepeta, delphiniums, campanula etc. as being iron hardy but did lose some this year.)
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"He who has a library and a garden wants for nothing." -Cicero
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