PERENNIALS FOR DIFFERENT PURPOSES 



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J. Perennials Which Should Be Treated as Biennials. There 

 are certain plants generally known as perennials which will "run out" 

 in the average garden after a period of two to three years. They 

 may still continue to grow, but after the first two years they are 

 much less vigorous. The plants in this group should be planted 

 with the idea that at the end of two years the old plants will be re- 

 moved and new ones put into their places. 



Antirrhinum majus 



Snapdragon 

 Bellis perennis 



English Daisy 

 Campanula medium 



Canterbury Bells 

 Campanula pyramidalis 



Chimney Bell-flower 

 Dianthus barbatus 



Sweet William 

 Digitalis purpurea 



Foxglove 

 Glaucium luteum 



Yellow Horned Poppy 



Hedysarum coronarium 



French Honeysuckle 

 Lunaria annua 



Honesty 

 Lychnis alba 



White Pink 

 Lychnis coronaria 



Mullein Pink 

 Lychnis dioica 



Red Campion 

 Viola cornuta 



Tufted Pansy 

 Viola tricolor 



Pansy 



K. Perennials to be Transplanted Frequently. There are 

 certain perennials which require special attention for their best devel- 

 opment. The perennials in this group should be taken up, divided, 

 and replanted every two or three years, as they grow more vigor- 

 ously and multiply faster than the other groups of perennials. 



a. To be divided every two years: 



Anemone japonica 



Japanese Windflower 

 Aquilegia 



Columbine 

 Chrysanthemum (hardy, large- 

 flowered varieties) 



Hardy Chrysanthemum 

 Helanthemum croceum 



Rock Rose 

 Helianth us 



Hardy Sun-flower 



b. To be divided every three years : 



Armeria (in variety) 



Sea Thrift 

 Iris (all varieties) 



Iris 



Viola (in variety) 

 Violet 



Lychnis coronaria 

 Mullein Pink 



Monarda didyma 

 Bergamot 



Paeonia (in variety) 



Peony (only to multiply) 



Phlox paniculata 

 Garden Phlox 



Rudbeckia 

 Cone-flower 



Phlox paniculata 



Garden Phlox 

 Thymus serpyllum lanuginosus 



Downy Thyme 



