Darrow considered it not very suitable in the east. See http://www.nal.usda.gov/pgdic/Strawberry/book/bokten.htm for Darrow's description of Marshall as well as other heirloom varieties.
I did a test planting of heirloom varieties several years ago and found Suwannee to be my favorite. I agree with Darrow: "Suwannee was named for its very high dessert quality, which is perhaps the best in the United States".
Scott z7 MD
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