Bruce Kovach  is in the process of building solid northern hardy doubles.  His program consists of both diploids and tetraploids.  He has been working with doubles since 2001, his first two double introductions will be coming out in 2006.  One following in 2007  He is focusing on large ruffled doubles with edges in many cases.  He is using many of the latest double cultivars to create his own line.  Here is several of his doubles that will be coming out beginning in 2006.  (Region 2, Zone 4-5, Michigan) CENTERPIECE GARDENS, located in Beaverton, MI is owned and operated by Bruce and Pat Kovach. We have over 375 varieties including 125 varieties of doubles; we plant about 2000 seedlings (all doubles) each year and hope to be able to supply northern gardens with hardy doubles very soon.  Contact information, (989) 689-3030, Fax: (989) 689-2345, zone 4/5, e-mail CENTERPIECEGARDENS@YAHOO.COM, Our peak bloom is around July 20th.  Please call for directions and best times if you would like to visit, Mapquest and Yahoo maps do NOT show our correct location. If you would like a catalog, please e-mail us or snail mail us at 5501 Red Oak Rd, Beaverton, MI 48612 Our shipping season is usually late April though October each year.  We try to ship Monday or Tuesday so that your plants are delivered before the weekend.