Pond Cypress (spp.) Pond Cypress 'Morris (Debonair)'
Pond Cypress 'Prairie Sentinel' Pond Pine
Pondcypress (spp.) Pondcypress 'Morris (Debonair)'
Pondcypress 'Prairie Sentinel' Ponderosa Pine
Pop Ash Porcelain Berry Vine (spp.)
'Portrait' Rose Portugal Lauel
Portugese Laurel Cherry Possum Haw Holly (spp.)
Possum Haw Holly 'Benton' Possum Haw Holly 'Byers Golden'
Possum Haw Holly 'Cascade' Possum Haw Holly 'Council Fire'
Possum Haw Holly 'Hunter' Possum Haw Holly 'Miller City'
Possum Haw Holly 'Pocohantas' Possum Haw Holly 'Sentry'
Possum Haw Holly 'Sundance' Possum Haw Holly 'Warren's Red'
Possum Haw (spp.) Possum Haw Viburnum (spp.)
Possum Haw Viburnum 'Brandywine™' Possum Haw Viburnum 'Winterthur'
Possum Haw 'Brandywine™' Possum Haw 'Winterthur'
Post Oak Pot of Gold (spp.)
Pot of Gold 'Baby Sun' Pot of Gold 'Goldfink'
Pot of Gold 'Sterntaler' Pot of Gold: verticillata 'Golden Showers'
Pot of Gold: verticillata 'Grandiflora' Pot of Gold: verticillata 'Moonbeam'
Pot of Gold: verticillata 'Zagreb' Prague Viburnum (spp.)
'Prairie Blue Eyes' Daylily Prairie Crabapple
Prairie Dropseed Grass Prairie Grass (spp.)
Prairie Grass 'The Blues' 'Prairie Moonlight' Daylily
'Prairie Pride' Common Hackberry 'Prairie Sentinel' Pond Cypress
'Prairifire' Flowering Crabapple Prickly Acacia
Prickly Ash, Southern Prickly Cedar
Prickly Juniper Prickly Pear Cactus: compressa
Prickly Pear Cactus: leucotricha Prickly Pear Cactus: microdasys
Prickly Pear Cactus: phaeacantha discata Prickly Pear, Blind
Prickly Pear, Eastern 'Prime Minister' Summer Phlox
'Primrose Beauty' Red Hot Poker Primrose, Narrow Leaf Evening (spp.)
'Princess Alice' Rose 'Princess Diana' Apple Serviceberry
'Princeton Purple' Butterflybush: hybrid 'Pristine' Rose
Privet, Border Privet, Chinese (spp.)
Privet, Chinese 'Excelsum Superbun' Privet, Common (spp.)
Privet, Common 'Lodense' Privet, Florida
Privet, Glossy (spp.) Privet, Glossy 'Excelsum Superbun'
Privet, Golden (spp.) Privet, Japanese (spp.)
Privet, Japanese 'Curly Leaf' Privet, Texas (spp.)
Privet, Texas 'Curly Leaf' Privet, Vicary (spp.)
Privet, Waxleaf (spp.) Privet, Waxleaf 'Curly Leaf'
'Professor Sprenger' Flowering Crabapple 'Profusion' Flowering Crabapple
'Prostrata' Coast Redwood Prostrate Acacia
'Pseudocupressus' Eastern Red Cedar Puka
Pukanui 'Pulcherrima' American Arborvitae
Pulque Agave 'Pulverulenta' Black Elderberry
'Pumila' Dwarf Garden Serviceberry 'Pumila' Eastern White Pine
'Pumila' Pampas Grass 'Pumila Sudworth' American Arborvitae
Puriri