| Hostaname | RG | SZ | Leaf color | P | F | Origin |
| H. 'Pacer' Ran Lydell 2000 | R | | dgr | | | |
| H. 'Pacific Sunlight' R. Duback 1998 | R | M | ly | | | 'Golden Anniversary' hybrid |
| H. 'Pacific Sunset' G. R. Goodwin 2003 | R | | blgr,crwe | | | "blue splashed seedling" sport |
| H. 'Pacifica' G. Johnson 2004 | R | | | | | 'Ming Dynasty' seedling |
| H. 'Pagoda' Eric B. Smith/BHHS 1988 | R | M | y | | | Tardiana grex |
| H. 'Paintbrush' Eldren W. Minks 1976 | R | M | (ch,gre)>gr | | | 'Undulata' x ventricosa 'Aureomaculata' |
| H. 'Painted Lady' Ralph H. Benedict 1984 | R | DS | str,gr,cr,w | | | sieboldii sport |
| H. 'Pale Gold' Eunice V. Fisher 1968/P. Ruh 1997 | R | SM | y>gr | | | 'Golden Anniversary' hybrid |
| H. 'Pamela Lee' John O'Brien 2007 | R | | dg,lge | | | 'Radiant Edger' sport |
| H. 'Pamela San Martin' Patricia W. Balletta 1988 | R | S | w,ye | | | 'Little Aurora' sport |
| H. 'Panache' Beth Arnold 1999 | R | | goy,blgre | | | 'Gold Drop' sport |
| H. 'Pandora's Box' Hansen & Shady Oaks Nursery 1996 | R | DS | wc,blgre,lgr | | | 'Baby Bunting' sport |
| H. 'Papa's Gold' R. Snyder 2000 | R | | goy | | | 'Samurai' hybrid |
| H. 'Paradigm' Walden West/C. Purtymun 1999 | R | ML | ch>goy,blgre | | | 'Abiqua Recluse' sport |
| H. 'Parhelion' Walters Gardens 1997 | R | L | lgr,nawe | | | 'Sum and Substance' sport |
| H. 'Parky's Perfection' P. & J. Ruh 2002 | R | | gry,dgre | | | 'Birchwood Gold' sport |
| H. 'Parky's Prize' Jim Hawes/A. Summers 1999 | R | SM | gr,ye | | | 'Birchwood Parky's Gold' sport |
| H. 'Partridge Gold' N. Nelson/C. Sauve 2004 | R | | | | | 'Gold Edger' sport |
| H. 'Party Favor' R. Solberg/E. Crouch 2000 | R | M | gr | | | 'Donahue Piecrust' x 'Akebono' |
| H. 'Party Time' H. & D. Benedict 1995 | R | M | dgr | R | | 'Nooner' x 'Sparkling Burgundy' |
| H. 'Passionate Purple' Kuk’s Forest/Bob Kuk 2005 | R | | dgr | | | pachyscapa x 'Sea Octopus' |
| H. 'Pastures New' A. Summers/E. Smith/P. Ruh 1997 | R | SM | gr | | | nakaiana hybrid |
| H. 'Patent Leather' V. Wade/E. Elslager 2001 | R | | gr | | | unknown |
| H. 'Pathfinder' Briggs Nursery 1999 | R | M | crw,dgre | | | 'Francee' sport |
| H. 'Patience Plus' R. Snyder 1999 | R | | y,dgre | | | 'Owen Online' sport |
| H. 'Patricia' G. Heemskerk 2005 | R | | gr,che | | | 'Birchwood Parky's Gold' sport |
| H. 'Patricia's Paragon' L. Maroushek 1999 | R | | blgr | | | 'Tokudama' hybrid |
| H. 'Patrician' E. Skrocki/T. Avent 1999 | R | SM | lgr,ye | | | unknown |
| H. 'Patriot' John L. Machen 1991 | R | M | dgr,we | | | 'Francee' sport |
| H. 'Patriot Colors' A. Malloy 2005 | R | S | blgr | PU | | unknown |
| H. 'Patriot's Fire' A. Summers/K. Walek 1996 | R | ML | ch>y,we | | | 'Patriot' sport |
| H. 'Paul Revere' Mark Zilis 2003 | R | M | cr,dgre | | | 'Patriot' sport |
| H. 'Paul's Glory' Paul Hofer/Peter Ruh 1987 | R | ML | y>w,blgre | | | 'Perry's True Blue' sport |
| H. 'Pauline' David Stone/Peter Ruh 1987 | R | S | dgr | | | unknown |
| H. 'Pauline Brac' Henry Weissenberger 1986 | R | S | blgr | | | 'Blue Cadet' hybrid |
| H. 'Pay Day' Alex Malloy 2003 | R | | y | | | 'Cascades' hybrid |
| H. 'Peace' Paul Aden 1987 | R | DS | blgr,we | | | 'Blue Hugger' x 'Love Pat' |
| H. 'Peace Pipe' R. Goodwin 2005 | R | | crw,dgre | | | unknown |
| H. 'Peacock' E. Elslager 2005 | R | | dgr,str,y,cr | | | (x 'Galaxy') seedling |
| H. 'Peacock Strut' Wyatt Lefever/Bob Solberg 2005 | R | ML | blga | PU | | 'Riptide' seedling |
| H. 'Peanut' Jim Schwarz 2002 | R | D | w,dgre | | | unknown |
| H. 'Pearl Lake' Piedmont Gardens 1982 | R | SM | gr | | | unknown |
| H. 'Pearl Necklace' Ed Elslager 2004 | R | | | | | 'Color Fantasy' seedling |
| H. 'Pebble Beach' Fleeta Brownell Woodroffe 1972 | R | M | blgr,mot,ygr | | | unknown |
| H. 'Pebbles' Van Wade 2007 | R | | blgr | | | 'Dorset Blue' x 'Dorset Flair' |
| H. 'PeeDee Absinth' Ursula Syré-Herz 1990 | R | SM | lygr | | | 'Gold Drop' x 'Subcrocea' |
| H. 'PeeDee Apollo' Ursula Syré-Herz 1996 | R | | go | | | 'Peedee Gold Flash' x 'Krossa Regal' |
| H. 'PeeDee Dew Catcher' Ursula Syré-Herz 1992 | R | SML | ch>y | | | 'City Lights' x 'Bold Ruffles' |
| H. 'PeeDee Elfin Bells' Ursula Syré-Herz 1987 | R | SM | dgr | | | ventricosa hybrid |
| H. 'PeeDee Gold Flash' Ursula Syré-Herz 1987 | R | S | y>ch,nagre | R | | 'Kabitan' hybrid |
| H. 'PeeDee Granny Smith' Ursula Syré-Herz 1992 | R | M | gr | | | 'Shade Fanfare' x 'Bold Ruffles' |
| H. 'PeeDee Graymulkin' Ursula Syré-Herz 1987 | R | S | gagr | | | unknown |
| H. 'PeeDee Laughing River' Ursula Syré-Herz 1992 | R | SM | gr,we | | | 'Neat Splash' x 'Iron Gate Glamour' |
| H. 'PeeDee Picotee' Ursula Syré-Herz 1992 | R | S | ygr>y | | | ventricosa hybrid |
| H. 'PeeDee Spring Fever' Ursula Syré-Herz 1990 | R | S | crw,dgre | | | 'Louisa' x 'Subcrocea' |
| H. 'PeeDee Treasure' Ursula Syré-Herz 1989 | R | S | ygr | | | 'Gold Drop' x ventricosa |
| H. 'Peek-a-Boo' Paul Aden 1976 | R | M | bl | | | 'Tokudama Aureonebulosa' x 'Aden 355' |
| H. 'Peepshow' Scott Crabb 2002 | R | | str,dgr,gr,y,w | | | 'Striptease' sport |
| H. 'Peerless' C. Tompkins/P. & J. Ruh 2001 | R | L | gr | | | unknown |
| H. 'Pegasus' P. & J. Ruh 2001 | R | | w,gre | | | 'Undulata Univittata' sport |
| H. 'Peking' D. Stone/H. Payne/P. & J. Ruh 2005 | R | S | gry | | | unknown |
| H. 'Pelham Blue Tump' R. M. Kitchingman 1986 | R | S | blgr | | | 'Tokudama' hybrid |
| H. 'People's Choice' G. Kamp 1998 | R | | blgr | | | 'Placemat' hybrid |
| H. 'Peppermint Ice' Belle Gardens 1994 | R | S | dgr,wc | | | 'William Lachman' x montana |
| H. 'Peridot' R. Lydell 1995 | R | S | dgr | | | 'Halcyon' sport |
| H. 'Perky' V. Wade 1999 | R | | gr,cre | | | unknown |
| H. 'Permanent Wave' Pauline Banyai 1989 | R | SM | gr | | | unknown |
| H. 'Perry's True Blue' Wayside/Paul & Linda Hofer/Ruh 1981 | R | L | bl | | | (x sieboldiana 'Elegans') hybrid |
| H. 'Persephone' F. Nyikos 1999 | R | M | gry | | | "unknown" x 'Blue Dimples' |
| H. 'Pete's Passion' P. Ruh 1997 | R | L | y,blgre | | | 'Paul's Glory' sport |
| H. 'Peter Pan' Nancy Minks 1980 | R | SM | gagr | | | nakaiana x 'Helen Field Fisher' |
| H. 'Peter Ruh' Mark Zilis 2003 | R | L | dgr,ye | | | 'Paul's Glory' sport |
| H. 'Peter the Rock' Lucille Simpers/Peter Ruh 1991 | R | M | lgr | | | sieboldiana hybrid |
| H. 'Petite Gold' Julia Geissler 1970 | R | S | ygr | | | unknown |
| H. 'Petticoat Pink' H. Sugita/P. Ruh/J. Ruh 2001 | R | | lgr | | | kikutii var. caput-avis hybrid |
| H. 'Pewter Frost' J. Dishon 1996 | R | | blgr | | | pycnophylla x montana |
| H. 'Pewterware' Don Dean 1999 | R | | bl | | | 'Urajiro Hachijo' x 'Blue Moon' |
| H. 'Phantom' R. Solberg/J. & J. Wilkins 1995 | R | ML | gr | PU | | 'Riptide' hybrid |
| H. 'Philadelphia' B. Silvers 2006 | R | | blgr | | | 'Popcorn' sport |
| H. 'Photo Finish' Kuk's Forest 1988 | R | ML | cr,dgre>bl | | | 'Hoarfrost' seedling |
| H. 'Phyllis Campbell' Maxted/BHHS 1988 | R | M | y>gr | | | 'Fortunei' sport |
| H. 'Pianissimo' G. Johnson 2004 | R | | | | | "'Dorothy Benedict' F-2" x 'Gold Regal' |
| H. 'Picadello' Belle Gardens 1995 | R | SM | blgr,we | | | 'Shenanigans' sport |
| H. 'Picadilly Circus' C. Hanson/P. & J. Ruh 2005 | R | | dgr | | | unknown |
| H. 'Pie in the Sky' Ed Elslager 2003 | R | | str,blgr,y,cr | | | 'William Lachman' hybrid |
| H. 'Piecrust Promise' Peter Cross 2000 | R | M | gr,dgre | | | 'Green Piecrust' sport |
| H. 'Pied Piper' R. Lydell 1998 | R | | ygr,we | | | unknown |
| H. 'Piedmont Gold' F. Henry Payne/Piedmont Gardens 1982 | R | ML | y | | | unknown |
| H. 'Piedmont Honey' C. Tomashek 2007 | R | | | | | 'Piedmont Gold' sport |
| H. 'Piedmont Special' M. Zilis 2003 | R | L | dgr,ye | | | 'Piedmont Gold' sport |
| H. 'Pilgrim' G. Rasmussen/A. Malloy 1997 | R | S | lgr,cre | | | 'Flamboyant' hybrid |
| H. 'Pilgrim's Progress' A. Malloy 2000 | R | | lgr,crwe | | | 'Pilgrim' sport |
| H. 'Pin Stripe' Kevin C. Vaughn 1983 | R | ML | str,gr,cr,w | | | (x 'William Lachman') x 'Frances Williams' |
| H. 'Pineapple Juice' M. Zilis/R. Solberg 2003 | R | | goy | | | 'Pineapple Upsidedown Cake' sport |
| H. 'Pineapple Poll' E. Smith/BHHS 1988 | R | SML | dgr | | | sieboldiana x 'Lancifolia' |
| H. 'Pineapple Punch' Walters Gardens/Amy Bergeron 2005 | R | | dgr,(y>cr)e | | | 'Pineapple Upsidedown Cake' sport |
| H. 'Pineapple Ripple' Jim Schwarz 2007 | R | | gr,crye | | | 'Pineapple Juice' sport |
| H. 'Pineapple Upsidedown Cake' M. Zilis/R. Solberg 1999 | R | M | gr>ywc,dgre | | | 'Pineapple Poll' sport |
| H. 'Pink Lemonade' G. Johnson 2004 | R | | | | | 'Kinbuchi Tachi' x 'Subcrocea' |
| H. 'Pink Panther' Alex Malloy 1998 | R | S | str,w,gr | PI | | 'Island Charm' sport |
| H. 'Pinky' Pauline Banyai 1990 | R | SM | blgr | | | 'Blue Boy' hybrid |
| H. 'Pinwheel' Robert P. Savory 1983 | R | S | w,dgre | | | venusta hybrid |
| H. 'Pioneer' Chet W. Tompkins 1984 | R | XL | dgr | | | unknown |
| H. 'Piper Cub' Peter Cross 2002 | R | SM | y>ch | | | 'Glacier Cascade' hybrid |
| H. 'Pipin the Short' Alex Malloy 2003 | R | D | gr,we | | | 'Captain Atom' x venusta |
| H. 'Pistache' Danny Van Eechaute 2007 | R | | lgr,gre | | | 'Spilt Milk' sport |
| H. 'Pistachio Cream' Mark Zilis/E. Stratton 2005 | R | M | gr | | | 'Wylde Green Cream' sport |
| H. 'Pistachio Glow' Robert P. Savory 1990 | R | M | ly | | | 'Aspen Gold' x 'Tokudama' |
| H. 'Pitter Patter' Tony Avent 2007 | R | | gr,lye | | | "seedling #95-318" x 'Fall Bouquet' |
| H. 'Pixie Vamp' D. & J. Ward 1996 | R | | gr,(y>cr)e | | | 'Pinstripe' hybrid |
| H. 'Pizzazz' Paul Aden 1986 | R | SML | blgr,we | | | unknown |
| H. 'Placemat' Clarence Soules 1990 | R | L | blgr | | | sieboldiana x 'Tokudama' |
| H. 'Plain Jane' Herb Benedict/Van Wade 2007 | R | M | gry | | | 'Dorothy Benedict' seedling |
| H. 'Planet X' E. & J. Deckert 2005 | R | | gr,blgre | | | unknown |
| H. 'Planetary Streaker' Ed Elslager 2003 | R | | str,dgr,y,w | | | 'Foxy Doxy' hybrid |
| H. 'Platinum Tiara' Walters Gardens 1987 | R | SM | ch,we | | | 'Golden Scepter' sport |
| H. 'Plebe's Blues' Jim McBurney/G. Donsky 2004 | R | | | | | 'Blue Cadet' sport |
| H. 'Plug Nickel' R. Solberg/N. Solberg 2003 | R | | dgr | | | 'Cracker Crumbs' sport |
| H. 'Polished Jade' Ransom Lydell 1993 | R | M | gr | | | unknown |
| H. 'Polly Bishop' Kevin C. Vaughn 1977 | R | L | bl | | | ('Frances Williams' selfed) selfed |
| H. 'Polly Mae' Robert P. Savory 1982 | R | S | gr | | | sieboldii 'Alba' hybrid |
| H. 'Pollyanna ' Pauline Banyai 1983 | R | S | gr | | | unknown |
| H. 'Polychrome' Alex Malloy 1998 | R | | str,dgr,cr | PU | | 'Emerald Crown' sport |
| H. 'Pooh Bear' Clarence Falstad 1988 | R | S | y,gre. | | | 'Gold Drop' sport |
| H. 'Popcorn' E. Lachman/T. Schmid 1999 | R | ML | cr,blgre | | | unknown |
| H. 'Popo' Russ O'Harra/F. Riehl 1993 | R | D | blgr | | | unknown |
| H. 'Porcelain Vase' Mark R. Zilis 1988 | R | M | (gry>crw),dgre | | | 'Krossa Regal' sport |
| H. 'Potomac Glory' R. Whitmore 2002 | R | | gry,dgre | | | 'Potomac Pride' sport |
| H. 'Potomac Pride' Tony Avent 1995 | R | M | dgr | | | 'Blue Umbrellas' x 'Treasure Island' |
| H. 'Powder Blue' H. Sugita/P. Ruh 1998 | R | M | blgr | | | unknown |
| H. 'Powderpuff' F. Nyikos 2002 | R | | blgr | | | 'Halcyon' x 'Blue Dimples' |
| H. 'Power of Prayer' R. Snyder 2002 | R | | goy,dgre | | | 'Paradise Power' sport |
| H. 'Prairie Angel' D. Savory 2000 | R | S | gr | | Y | 'Fall Bouquet' hybrid |
| H. 'Prairie Fire' Bob Kuk 1994 | R | M | y | | | 'Gold Regal' x "Tokudama gold seedling" |
| H. 'Prairie Glow' Mark Zilis/P. & J. Ruh 2002 | R | M | y | | | unknown |
| H. 'Prairie Lightning' P. A. Kedl 2005 | R | | ly,str,gr,go | | | 'Prairie Glow' seedling |
| H. 'Prairie Magic' M. Zilis 2003 | R | | dgr,ye | | | 'Erie Magic' sport |
| H. 'Prairie Moon' Hans Hansen 2007 | R | | y | | | (streaked 'Elegans' x 'Fragrant Bouquet') seedling |
| H. 'Prairie Sky' Hans Hansen 2005 | R | | bl | | | ((x rupifraga) x 'Maruba Iwa') x 'Blue Jay' |
| H. 'Prairieland Memories' M. Zilis/Central Illinois Hosta Society 2003 | R | M | y>ch | | Y | 'Royal Standard' sport |
| H. 'Prawdzik Sunfish' C. Sauve 2004 | R | | | | | unknown |
| H. 'Praying Hands' G. Williams 1996 | R | M | dgr,naye | | | unknown |
| H. 'President's Choice' Steve C. Moldovan 1983 | R | XL | blgr | | | sieboldiana hybrid |
| H. 'Pretty Kitty' E. Elslager 1999 | R | | dgr,cre | | | 'Wide Brim' sport |
| H. 'Pretty Peggy' Dick & Jane Ward 1999 | R | | gry | | | 'White Vision' x montana f. macrophylla |
| H. 'Prima Donna' J. & J. Wilkins 1995 | R | L | dgr,(y>cr)e | | | (x 'William Lachman') sport |
| H. 'Prime Meridian' Mary Chastain/Randy Goodwin 2005 | R | | crw,gre | | | unknown |
| H. 'Prince Michael' S. & S. Zolock 2003 | R | | gry | | | 'Yellow Waves' hybrid |
| H. 'Princess Anastasia' G. Trucks 1998 | R | | y,blgre | | | 'Ryan's Big One' sport |
| H. 'Princess Diana' Gary Trucks 1997 | R | | y,blgre | | | 'Tokudama Flavoplanata' sport |
| H. 'Princess Hannah' S. & S. Zolock 2003 | R | | gry | | | 'Chinese Sunrise' hybrid |
| H. 'Princess Johnnie' Patsy Stygall 2007 | R | | w,dgre | | | 'Sea Prize' x 'Sea Prize' |
| H. 'Princess Kendra' Patsy Stygall 2007 | R | | goy | | | 'Lucy Vitols' seedling |
| H. 'Princess of Karafuto' Japan/Marjorie Soules 1984 | R | S | dgr,we | | | |
| H. 'Princess Pat' Patsy Stygall 2007 | R | | dgr,crwe | | | 'Clyde's Birthday' x 'Clyde's Birthday' |
| H. 'Principal's List' Stuart Asch 2003 | R | | str,blgr,cr | | | "'Dorothy Benedict' seedling 'HB1'" seedling |
| H. 'Pro Tek Tor' F. Nyikos 2007 | R | VL | bl | | | 'Little Boy' seedling |
| H. 'Prom Queen' R. Mayer 2006 | R | | y, blgre | | | 'Pin Stripe Sister' sport |
| H. 'Promised Land' Alex Malloy 2004 | R | | str,gr,cr | | | (x 'Sea Tornado') selfed |
| H. 'Psalms' Alex Malloy 2004 | R | | | | | "'Sea Tornado' F-1" seedling |
| H. 'Puck' M. Zilis/B. Zumbar 2003 | R | S | gr | | | 'Just So' sport |
| H. 'Puckered Giant' Loleta K. Powell 1983 | R | VL | bl | | | sieboldiana 'Elegans' hybrid |
| H. 'Pugie's Pride' E. Elslager/D. Jansen 2001 | R | | str,blgr,gr,y | | | 'Breeders Choice' hybrid |
| H. 'Pulsar' Ed Elslager 2000 | R | | gr,crw | | | 'Heavenly Constellation' sport |
| H. 'Punky' R. Kuk 1999 | R | S | y,blgre | | | 'Blue Wedgwood' sport |
| H. 'Purbeck Mist' Eric Smith/J. Morss/R. Bowden/P. & J. Ruh 2005 | R | | blgr | | | "Tardiana Group" seedling |
| H. 'Purbeck Ridge' Eric B. Smith/BHHS 1988 | R | M | bl | | | Tardiana grex |
| H. 'Purple and Gold' Eldren W. Minks 1976 | R | SM | y | PU | | 'Wogon' x 'Undulata' |
| H. 'Purple Boots' Danny Van Eechaute 2004 | R | | gr | PU | | 'Gig Harbor' x 'Riptide' |
| H. 'Purple Bouquet' Pauline Banyai 1986 | R | M | dgr | | | 'Nakaimo' hybrid |
| H. 'Purple Charmer' C. Lantis/Peter Ruh 1993 | R | S | gr | | | gracillima x 'Ogon Koba' |
| H. 'Purple Dwarf' K. J. W. Hensen 1983 | R | S | gr | | | nakaiana hybrid |
| H. 'Purple Essence' Mark Zilis/P. & J. Ruh 2005 | R | | gr | PUB | Y | 'Sweet Susan' x rupifraga |
| H. 'Purple Flame Forever' T&Z Nursery/Mark Zilis 1988 | R | | ly | | | ventricosa 'Aureomaculata' hybrid |
| H. 'Purple Lady Finger' Robert P. Savory 1982 | R | SM | dgr | | | longissima x clausa var. normalis |
| H. 'Purple Mountain Majesties' E. Elslager 2002 | R | | dblgr,grye | | | 'Galaxy' x 'Maekawa' |
| H. 'Purple Passion' Herb Benedict/P. & J. Ruh 2005 | R | SM | gr | PU | | unknown |
| H. 'Purple Profusion' Frances Williams/Connie Williams 1986 | R | SM | dgr | | | sieboldii 'Alba' hybrid |
| H. 'Purple Robe' Ursula Syré-Herz 1990 | R | S | ygr | | | unknown |
| H. 'Purple Verticulated Elf' Herb Benedict 2003 | R | | bl>pu | | | "seedling of F6 seedling of 'Dorset Blue'" selfed |