Phlomis, 344, 354, 356, 363,
364, 373
Phlomis fruticosa, 284
Phlomis russeliana, 284
Phlomis tuberosa, 284
‘Amazone’, 284
Phlox divaricata, 285 , 347,
34 9, 357, 360, 361, 362,
363, 366, 373
‘Chattahoochee’, 285
‘Fuller’s White’, 285
Phlox divaricata subsp.
laphamii ‘Chattahoochee’,
285
Phlox maculata, 286 , 347,
34 9, 356, 358, 359, 367,
368, 369, 377
‘Alpha’, 116, 286
‘Miss Lingard’, 286
‘Rosalind’, 286
Phlox paniculata, 287 , 349,
356, 358, 359, 361, 362,
367 , 368, 369, 371, 377
‘David’, 287
‘David’s Lavender’, 287
‘Delta Snow’, 287
dividing, 81
‘Jeana’, 287
‘Laura’, 287
‘Lichtspel’ (light show),
287
mildew-resistant cultivars,
287
‘Natascha’, 287
‘Peppermint Twist’, 287
Pink Flame (‘Bartwelve’),
287
‘Robert Poore’, 287
seeding variability, 100
‘Shortwood’, 287
‘Speed Limit 45’, 287
phlox / Phlox, 376, 384
‘Alpha’, 95, 114
cutting back, 116, 384, 386
as a heavy feeder, 55
mildew as pest of, 65
mildew-resistant forms,
66, 67
thinning, 126
transplanting, 50
Phlox stolonifera, 288 , 347,
353, 358, 360, 365, 373
‘Blue Ridge’, 288
pruning, 134
winter interest, 131
Phlox subulata, 289 , 358, 359,
361, 362, 365, 366, 373
‘G. F. Wilson’, 289
pruning, 134
phosphate, 30–31
photographs, using, 18, 19, 45
photoperiod, 116
physostegia, 384
Physostegia virginiana, 290 ,
343, 346, 358, 359, 367,
368, 369, 374, 376
‘Crystal Peak White’, 290
‘Eyeful Tower’, 290
‘Miss Manners’, 290
pinching, 122
‘Rose Queen’, 290
‘Variegata’, 290
‘Vivid’, 290
Phytophthora, 66
pinching
breaking apical
dominance, 9 1
cutting back vs., 114, 117–
118, 121
factors affecting timing,
122
perennials that can be
pinched, 369–37 0
perennials that do not
respond well to, 122, 370
in planting / maintenance
schedule, 382, 384, 386,
387
uses and technique, 121–
122
pinching of specific plants.
See Encyclopedia of
Perennials; specific plant
names
pincushion flower, 309
‘Butterfly Blue’, 309
pink muhly grass, 229
‘Pink Panda’ strawberry, 215
pinks, 126
pink turtlehead, 184, 342
place-marking during
winter, 132
Plantaginaceae, 184, 201, 202,
261, 280, 338, 340
planting
into an existing garden, 49
depth and techniques, 49
new beds, 45–49
in phases, 37 9
See also planting /
maintenance schedule,
381-391
plant size, 26–27, 45–46. See
also height
Platycodon, 350
Platycodon grandiflorus, 291 ,
34 9, 351, 355, 356, 359,
361, 362, 368, 369, 376,
377
cutting back, 88, 116deadheading, 98
as late-emerging, 382
‘Mariesii’, 291
Plumbaginaceae, 160, 184,
260
plumbago, 184
plume poppy, 269
Podophyllum, 357, 364
Asian types, 292, 347, 355
Podophyllum delavayi, 292
Podophyllum hexandrum, 292
Podophyllum peltatum, 292,
325, 353
Podophyllum pleianthum, 292
‘Galaxy’, 292
‘Kaleidoscope’, 292
‘Spotty Dotty’, 292
poisonous plants,- See also Encyclopedia of
Perennials
Polemoniaceae, 285, 286, 287,
288, 289, 293
Polemonium caeruleum, 293 ,
350 , 355, 358, 360, 361,
362, 366, 373, 374, 376
pollen and nectar-producing
plants, 65
Polygonaceae, 147, 283, 300
Polygonatum odoratum
‘Variegatum’, 294 , 347,
354, 363, 364, 370, 377
Polygonum polymorphum, 147
Polystichum acrostichoides,
132, 212, 350
Polystichum polyblepharum,
212
poppies, 110, 131, 389
‘Beauty of Livermore’, 280
‘Patty’s Plum’, 280
‘Princess Victoria Louise’,
280
‘Royal Wedding’, 280
Porteranthus trifoliata, 225
Potentilla, 348, 356, 358, 367,
371, 376, 377
Potentilla atrosanguinea, 295
‘‘Flamenco’, 295
‘Gibson’s Scarlet’, 295
‘Vulcan’, 295
‘William Rollinson’, 295
Potentilla nepalensis, 294 ,
295
‘Melton Fire’, 295
‘Miss Willmott’, 295
‘Ron McBeth’, 295
powdery mildew, 66–67
‘Powis Castle’ artemisia, 164
prairie dock, 314
prairie dropseed, 229
prairie flax, 261