Pleioblastus akebono Pleioblastus argenteostriatus var. glabra 'Tsube'
Pleioblastus auricomus Pleioblastus chino var. vaginatus
Pleioblastus minima Pleioblastus pygmaeus
Pleioblastus pygmaeus var. distichus Pleioblastus simonii 'Variegatus'
Pleioblastus variegatus Poa colensoi
Poa pratensis Poa trivialis
Podophyllum peltatum Polaskia chende
Polemonium 'Bressingham Purple' Polemonium boreale 'Heavenly Habit'
Polemonium caeruleum Polemonium caeruleum 'Brise d'Anjou'
Polemonium reptans Polemonium yezoense 'Purple Rain'
Polianthes tuberosa Polygala paucifolia
Polygonatum falcatum Polygonatum fuscum
Polygonatum humile Polygonatum odoratum
Polygonatum odoratum 'Variegatum' Polygonatum odoratum var. thunbergii
Polygonatum odoratum var. thunbergii 'Variegatum' Polygonum affine
Polygonum affine 'Border Jewel' Polygonum affine 'Dimity'
Polygonum amplexicaule Polygonum amplexicaule 'Speciosa (Firetail)'
Polygonum amplexicaule 'Taurus' Polygonum aubertii
Polygonum bistorta 'Superbum' Polygonum campanulatum
Polygonum capitatum Polygonum emodi
Polygonum japonicum Polygonum japonicum 'Compactum'
Polygonum japonicum 'Crimson Beauty' Polygonum japonicum 'Variegatum'
Polygonum microcephalum 'Red Dragon' Polygonum multiflorum
Polygonum polymorphum Polygonum virginianum
Polygonum virginianum 'Compton's Form' Polygonum virginianum 'Lance Corporal'
Polygonum virginianum 'Painter's Pallete' Polygonum virginianum 'Variegatum'
Polypodium musifolium Polypodium polypodiodes
Polypodium vulgare 'Cornubiense' Polystichum acrostichoides
Polystichum andersonii Polystichum nepalense
Polystichum polyblepharum Polystichum polyblepharum 'Variegated'
Polystichum setiferum Polystichum setiferum 'Densum'
Polystichum setiferum 'Plumosomultilobum' Polystichum setiferum 'Rotundatum Cristatum'
Pontederia cordata Pontederia cordata 'Giant'
Pontederia cordata 'Giant White' Pontederia cordata 'Lavender Pink'
Pontederia cordata 'White' Porphyrocoma pohliana
Portulacaria afra Portulacaria afra 'Variegata'
Potentilla cuneata Potentilla megalantha
Potentilla nepalensis 'Miss Willmott' Potentilla nepalensis 'Ron McBeath'
Potentilla neumanniana Potentilla x tonguei
Pratia pedunculata Primula x 'Cowichan'
Primula x 'Kewensis' Primula x 'Tie Dye'
Primula capitata Primula florindae
Primula florindae 'Ceperly Hybrid' Primula japonica
Primula malacoides Primula obconica
Primula obconica 'Apple Blossom' Primula x polyantha
Primula x polyantha 'Pacific Giants' Primula sieboldii 'Snowflakes'
Primula veris Primula veris 'Katy McSparron'
Primula vialii Primula vialii 'Orchid Primrose'
Primula vulgaris Primula vulgaris 'Wanda Mix'