| Rating | Plant | Thumbnail |
| Cactus Dahlia 'P.G. Wodehouse'
Dahlia
Hybridized by Geerlings, 1992 | |
| Waterlily Dahlia 'Painted Desert'
Dahlia |  |
| Formal Decorative Dahlia 'Painted Lady'
Dahlia |  |
| Dahlia 'Palisade Peach'
Dahlia
Hybridized by Paul Sparks, 1999? |  |
 | Dahlia 'Pam Howden'
Dahlia |  |
| Decorative Dahlia 'Panuco'
Dahlia
Hybridized by Ruigrok-van Haaster, 2001
Additional info: (PP13231, Dahlinova® Longlife series) | |
| | Fimbriated Dahlia, Laciniated 'Papa's Benji'
Dahlia
Hybridized by Rebersky, 2003 |  |
| Decorative Dahlia 'Papageno'
Dahlia |  |
| Formal Decorative Dahlia 'Parakeet'
Dahlia
Hybridized by Gitts, 1997 |  |
| Semi Cactus Dahlia 'Pari Taha Sunrise'
Dahlia |  |
| | Cactus Dahlia 'Park Princess'
Dahlia
Hybridized by Maarse, 1959 |  |
| Semi Cactus Dahlia 'Park Record'
Dahlia |  |
| Decorative Dahlia 'Parkland Glory'
Dahlia |  |
| Dahlia 'Parklands Dolly'
Dahlia |  |
| Semi Cactus Dahlia 'Passion'
Dahlia
Hybridized by Rodewald, 1982 |  |
| Decorative Dahlia 'Patches'
Dahlia |  |
| Dwarf Dahlia 'Patricia'
Dahlia
Hybridized by S. Trees, 2003
Additional info: (PP14753, Royal Dahlietta™ Series) | |
| Waterlily Dahlia 'Patricia Ann's Sunset'
Dahlia | |
| Dwarf Dahlia 'Patty'
Dahlia
Hybridized by Gitzels, 2005
Additional info: (PP17127, Royal Dahlietta™ Series, aka Dapapu) | |
| Waterlily Dahlia 'Patty Cake'
Dahlia |  |
| Formal Decorative Dahlia 'Peaches'
Dahlia |  |
| Decorative Dahlia 'Peaches and Cream'
Dahlia
Additional info: (PBR) |  |
| Formal Decorative Dahlia 'Peaches And Dreams'
Dahlia |  |
| Decorative Dahlia 'Pearl of Heemstede'
Dahlia
Hybridized by Geerlings, 1984 |  |
| Pompon Dahlia 'Pearson's Michelle'
Dahlia |  |
| Decorative Dahlia 'Pecos'
Dahlia
Hybridized by Ruigrok-van Haaster, 2001
Additional info: (PP12799, Dahlinova® Longlife series) | |
| Dahlia 'Pee Gee'
Dahlia
Hybridized by Higgo, 1997 |  |
| Dahlia 'Peekaboo'
Dahlia |  |
| Waterlily Dahlia 'Peggy Jean'
Dahlia
Hybridized by Gitts, 2005 | |
| Semi Cactus Dahlia 'Penelope'
Dahlia
Hybridized by Engelhardt, 1997 | |
| Dahlia 'Penhill Dark Monarch'
Dahlia | |
| Dahlia 'Penhill Watermelon'
Dahlia |  |
| Ball Dahlia 'Peter'
Dahlia
Hybridized by Martin, 1967 | |
| Dahlia 'Pineapple Lollipop'
Dahlia
Hybridized by Traff, 1991 | |
| Fimbriated Dahlia Laciniated Dahlia 'Pinelands Marika'
Dahlia
Additional info: (Marika) |  |
| Laciniated Dahlia 'Pinelands Pam'
Dahlia |  |
| Fimbriated-Laciniated Dahlia 'Pinelands Princess'
Dahlia |  |
| | Decorative Dahlia 'Pink Attraction'
Dahlia |  |
| Decorative Dahlia 'Pink Cactus'
Dahlia |  |
| | Dahlia 'Pink Gingham'
Dahlia |  |
