Beach Plum History and growers guide Home page .pdf files require Acrobat Reader 4.0 or higher. Free download. The Beach Plum: A History and Grower's Guide (.pdf) Copies of the Grower's Guide can be purchased for $4 from: Cape Cod Cooperative Extension Deeds and Probate Building Railroad Ave. Barnstable, MA 02630 Phone:(508) 375-6690 Fax: (508) 362-4518