BULBS - LAYERS - DIVISIONS 103 



DIVISION OF PERENNIALS 



One of the simplest methods of propagating perennials is that 

 of division. With a large knife or spade huge clumps are cut into 

 convenient sizes for replanting. Certain very rampant growers get 

 very much choked after growing in one place for any length of time. 

 Examples of perennials which require almost annual propagation 

 are: Michaelmas Daisy, Achillea ptarmica and A. Millefolium roseum 

 Helianthus, Sedum, some Veronicas, Chrysanthemums, (Enothera, 

 and all perennials which sucker badly should be moved and divided 

 every year. Artemisia, Boltonia, Campanula, Geum, Funkia, 

 Doronicum, Armeria and Thalictrum are all propagated by division. 



Certain perennials, such as Peonies, Dictamnus, and Fritillaria, 

 should not be moved often; they must be thoroughly established 

 in order to bloom properly. Peonies should be moved every six or 

 seven years, Phlox every four years and Iris every three years. 



Boxwood can easily be separated by tearing to pieces old dwarf 

 plants; the divisions may be replanted to make a tiny hedge. 



