WINDOW GARDENING 



with smaller pieces. This allows a free passage 

 of the water and also permits air to enter and 

 come in contact with the roots. 



Many other materials may be used for this 

 purpose. Where broken pot pieces are not 

 available, soft brick, broken into fragments the 

 size of filberts, forms a good substitute. Char- 

 coal makes an excellent material for this pur- 

 pose and gravel, sphagnum moss and cinders 

 may also be used. 



An inch of drainage material is all that is 

 necessary for a five or six inch pot. For all 

 sizes over six inches in diameter about two 

 inches should be used. 



SHIFTING OF PLANTS 



By shifting is meant the transfer of plants 

 from smaller to larger pots. This should be 

 done whenever the roots have filled the old pot. 

 If it is not done the plant becomes pot-bound 

 and this is followed by a stunted growth, the 

 production of small leaves and the loss of the 

 older ones. In some cases, as with certain 

 blooming plants, it is best to let the plants be- 



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