Japanese maples, rhododendrons, azaleas and fall color. Working with his wife and fellow enthusiast Carole Groh, he's built a world class collection during the past 30 years in their 1-acre garden, and traveled the world to study those plants and talk with those most knowledgeable about growing them. Thus his contacts in the horticultural world have grown right along with the plants.
His garden has become a destination for horticultural luminaries including Professor Emeritus (University of Wisconsin) Ed Hasselkus, the late great conifer man of the ages Chub Harper and one of England's premier gardeners, Adrian Bloom.
Dennis is past President of the American Conifer Society (ACS), current co-chair of one of the ACS' most exciting conferences to date (learn more!), instructor from 2003 - 2008 at the Michigan School of Gardening, and lecturer on conifers, fall color, Rhododendrons and azaleas, woody plants and Japanese gardens... What more need be said? We are pleased to have his help moderating our Forum.
Right: Dennis with Bonsai master Saburo Kato in Omiya Bonsai Village, Japan.
(Photo © Carole Groh)
Below, left: With J.R.P. Van Hoey Smith at Trompenburg Arboretum, Rotterdam, the Netherlands.
Below, right: At Callaway Gardens (Photos © Carole Groh)
Right: In his own garden one fall, with Chamaecyparis pisifera 'Golden Mop' and Acer japonicum f. aconitifolium (a.k.a. Fern Leaf maple or Mai kujaku, which means dancing peacock). (Photo © Carole Groh)
Right: Ed Hasselkus (Professor Emeritus, Ornamental Horticulture, University of Wisconsin and Curator of the Longenecker Horticultural Gardens) at the Groh Garden in August 2006. Photo ©2006 Carole Groh
Dennis does all he can to advance knowledge in the horticultural field. A scientist by profession, he brings an incisive perspective to his gardening, asking "why" and demanding explanations for "how" that are supported by fact. He has played a lead role in developing the upcoming American Conifer Society international conference and a Conifer College program to precede it. His dedication to comprehensive, fact-based gardening is evident throughout.
Dennis says: Be sure to visit the American Conifer Society site!