... for anyone interested in Penstemonthe most complete, one-stop source of information on penstemon gardening that is currently available. -- Dale T. Lindgren, Rock Garden Quarterly, Winter 2000
... of great value to any student of the genus, botanical or horticultural, and essential for any botanical or horticultural library. -- Choice, April 2000
A fascinating treatise of major topics offering the gardener ready help in growing what... is an easily grown beauty. -- Jan Hale Barbo, The New Mexican, April 2, 2000
Nold's enthusiasm for penstemons is so strong that the reader will be tempted to try these plants... -- Joanne Carpender, National Council of State Garden Clubs, March 2000
Nolds dual perspectives, botany and horticulture, have merged into a beautifully written book about a genus he clearly loves, Penstemon. -- Judy Mielke, The American Gardener, March 2000
Usefully illustrated with wonderful botanical watercolours and with photographs which show the plants in their natural (and often unlikely) conditions. -- Gardens Illustrated, August/September 2000
Particularly beloved by rock gardeners, penstemons belong in every garden. The author provides useful cultural information based on practical experience.