| Hostaname | RG | SZ | Leaf color | P | F | Origin |
| H. 'Za Za Zoom' Stuart Asch 2003 | R | | y | | | 'Gold Standard' hybrid |
| H. 'Zachary Taylor' H. Sugita/M. Zilis/P. & J. Ruh 2001 | R | L | y | | | unknown |
| H. 'Zager Blue' H. A. Zager/Peter Ruh 1987 | R | M | blgr | | | |
| H. 'Zager Giant Puckered' H. A. Zager/Peter Ruh 1989 | R | M | lblgr | | | sieboldiana hybrid |
| H. 'Zager Green' H. A. Zager/Peter Ruh 1987 | R | M | blgr | | | sieboldiana x montana |
| H. 'Zager Green Rim' H. A. Zager/Peter Ruh 1987 | R | ML | gr,(lgr>gr)e | | | |
| H. 'Zager's Pride' H. A. Zager/Peter Ruh 1987 | R | L | blgr,che | | | sieboldiana 'Elegans' sport |
| H. 'Zager's Tokudama' H. Zager/P. & J. Ruh 2003 | R | | dgr | | | 'Tokudama' hybrid |
| H. 'Zager's White Edge' H. A. Zager/Lucille Simpers 1980 | R | ML | gr,we | | | 'Fortunei' sport |
| H. 'Zebra Stripes' Tony Avent 2005 | R | | w,mot,gr | | | (x 'Outhouse Delight' ) x 'Abba Dabba Do' |
| H. 'Zebson' L. Jones 1998 | R | L | y,lye | | | 'Sum and Substance' sport |
| H. 'Zeus' Fury' K. Dye 2002 | R | | str,dgr,w,y | | | 'Neat Splash' hybrid |
| H. 'Zipper' G. Johnson 2004 | R | | | | | 'Chartreuse Wiggles' seedling |
| H. 'Zippity Do Dah' Walters Gardens 2000 | R | ML | gr,cre | | | 'Abba Dabba Do' sport |
| H. 'Zippy Zepps' S. Tylinsky/Alex Malloy 2003 | R | | str,blgr,y | | | 'Regal Splendor' sport |
| H. 'Zitronenfalter' Heinz Klose 1988/P. & J. Ruh 2003 | R | M | y>ygr | | | unknown |
| H. 'Zodiac' Q&Z Nursery/P. Ruh 2000 | R | | ch,ircre | | | 'Richland Gold' sport |
| H. 'Zounds' Paul Aden 1978 | R | ML | y | | | 'Golden Waffles' x 'Golden Prayers' |
| H. 'Zowie' Peter Cross 2000 | R | | goy,we | | | 'Norwalk Chartreuse' sport |
| H. 'Zuzu's Petals' Dennis Savory 1999 | R | | lgr,ye | | | 'Birchwood Parky's Gold' sport |
| H. 'Zydeco' Ed Elslager 2003 | R | | blgr,ye | | | 'Sea Prize' x hypoleuca |
| H. 'ZZZZ, a Sleeping Beauty' E. Elslager 2002 | R | | str,blgr,y | | | (x 'Dorothy Benedict') x 'Maekawa' |