| Hostaname | RG | SZ | Leaf color | P | F | Origin |
| H. 'Quaker Lady' Hajime Sugita/Pete Ruh 1999 | R | | goy | PRB | | kiyosumiensis x pycnophylla |
| H. 'Qualifying Queen' Hajime Sugita/Pete Ruh 1999 | R | | gr | | | kiyosumiensis x pycnophylla |
| H. 'Quark' Dick & Jane Ward 2015 | R | | gr | | | 'Firefly' seedling |
| H. 'Quasar' Dick & Jane Ward 2013 | R | | gr | | | 'Liberty' seedling |
| H. 'Queen Isabella' Randy Goodwin 2013 | R | D | gr,crwe | | | |
| H. 'Queen Josephine' Bob Kuk 1991 | R | SM | dgr,(y>cr)e | | | 'Josephine' sport |
| H. 'Queen of Hearts' Bob Savory 1983 | R | L | gr,we | | | (x sieboldiana) sport |
| H. 'Queen of Islip' James Goffery 1990 | R | L | (ch>goy),blgre | | | 'Frances Williams' sport |
| H. 'Queen of the Hill' Ed Elslager 2005 | R | | dgr,str,lgr,y | | | (x 'Galaxy') seedling |
| H. 'Queen of the Seas' Mildred Seaver 2001 | R | L | blgr | | | unknown |
| H. 'Queen of the Universe' Butch Graves/O. Adler 2011 | R | | gr,ye | | | 'Pin Stripe Sister' seedling |
| H. 'Quesadilla' Mark Zilis/Mary Beth Vanous 2010 | R | M | gr,str,(y>w) | | | 'Guacamole' sport |
| H. 'Quest' Alex Malloy 2004 | R | | | | | unknown |
| H. 'Question Mark' Pete Ruh 1999 | R | SM | dgr,cre | | | unknown |
| H. 'Queue' Frank Nyikos 2005 | R | S | gagr | | | venusta x 'Teaspoon' |
| H. 'Quicksand' Doug & Mardy Beilstein 2021 | R | | gr,ye | | | (('Color Fantasy' x "OP#2BL") x 'Green Dragonet') x 'Ringtail' |
| H. 'Quicksilver' Roy Herold 2000 | R | | blgr,crwe | | | 'Dark Star' x 'Elatior' |
| H. 'Quiet Nights' Meg & Jim Dalton 2012 | R | | gr | PR | | 'High Kicker' x (x 'Hacksaw') |
| H. 'Quiet Water Disturbed' Frank Nyikos 2002 | R | VL | dgr | | | unknown |
| H. 'Quiet Waters' Lynn Bisschop 2008 | R | | gr,w,gre | | | 'Aurora Borealis' seedling |
| H. 'Quill' Roy Herold 1996/AHS/Walek 2009 | R | SM | gr | | | pycnophylla x yingeri |
| H. 'Quilted Cup' Eldren Minks 1980 | R | M | blgr | | | 'Tokudama' x 'Crinkle Cup' |
| H. 'Quilted Hearts' Marjorie Soules 1989 | R | L | dgr | | | sieboldiana hybrid |
| H. 'Quilted Skies' Marjorie Soules 1985 | R | XL | sibl | | | sieboldiana x 'Frances Williams' |
| H. 'Quilting Bee' Russ O'Harra/Russ O'Harra Hosta Society 1999 | R | SM | dgr | | | unknown |
| H. 'Quilting Party' Lucy Simpers 1980 | R | L | gr | | | 'Crispula' hybrid |
| H. 'Quinnipiac' Alex Malloy/Pierre Bennerup 2004 | R | | bl,we | | | 'Blue Cadet' sport |
| H. 'Quite Pleasing' Doug & Mardy Beilstein 2013 | R | | w,gre | | | unknown |